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Old 04-28-2024, 05:57 PM
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Default 421 Block - Sevice Replacement?

A friend just bought a 1964 421 block, standard bore,. Faint code on the front. He was wondering if it’s an SR block. Either way, it’s a cool score. Pics below:
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Will Rivera

'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded)
'69 LeMans Vert, 350, #47 heads: Non-running project

Last edited by grivera; 04-28-2024 at 06:02 PM.
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  #2  
Old 04-28-2024, 05:59 PM
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Will Rivera

'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded)
'69 LeMans Vert, 350, #47 heads: Non-running project
  #3  
Old 04-28-2024, 06:04 PM
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Real nice!
Dare I ask how much he payed for it?

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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!

1) 1940s 100% silver 4 cup tea server set.

Two dry rotted 14 x 10 Micky Thompson slicks.

1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.

Education is what your left with once you forget things!
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Old 04-28-2024, 06:10 PM
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He’s keeping that private for now…

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Will Rivera

'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded)
'69 LeMans Vert, 350, #47 heads: Non-running project
  #5  
Old 04-28-2024, 07:06 PM
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Service Replacement wouldn't have an eun on it
What's the engine code for it?



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  #6  
Old 04-28-2024, 07:32 PM
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He says it isn’t legible

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Will Rivera

'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded)
'69 LeMans Vert, 350, #47 heads: Non-running project
  #7  
Old 04-29-2024, 05:53 AM
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Just note the ALL service replacement blocks came with rings and fitted Pistons .

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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!

1) 1940s 100% silver 4 cup tea server set.

Two dry rotted 14 x 10 Micky Thompson slicks.

1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.

Education is what your left with once you forget things!
  #8  
Old 04-29-2024, 06:51 AM
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Good to know- assembled?

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Will Rivera

'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded)
'69 LeMans Vert, 350, #47 heads: Non-running project

Last edited by grivera; 04-29-2024 at 07:11 AM.
  #9  
Old 04-29-2024, 07:39 AM
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IMO a freshly shot peened used block. Nice find though.

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Old 04-29-2024, 08:56 AM
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Yes, the rings where on the pistons and the pistons where in the bore.

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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!

1) 1940s 100% silver 4 cup tea server set.

Two dry rotted 14 x 10 Micky Thompson slicks.

1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.

Education is what your left with once you forget things!
  #11  
Old 04-29-2024, 04:06 PM
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The front 2 four bolt caps are missing the outer bolts.

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Old 04-29-2024, 04:47 PM
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I never realized that the 64 motors did not use a full length windage tray and still had the bell housing reinforcement ribs from the 425 trophy motors.

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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!

1) 1940s 100% silver 4 cup tea server set.

Two dry rotted 14 x 10 Micky Thompson slicks.

1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.

Education is what your left with once you forget things!
  #13  
Old 04-29-2024, 05:22 PM
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Quote:
Originally Posted by steve25 View Post
I never realized that the 64 motors did not use a full length windage tray and still had the bell housing reinforcement ribs from the 425 trophy motors.
1965 engines were the first to use the full length windage tray, the dipstick tube configuration changed completely as well.

Maybe you missed this thread on 1964 389 and 421 blocks:

https://forums.maxperformanceinc.com...d.php?t=772995

And my 1964 421 HO build, both threads show the windage tray setup used on 1964 and earlier engines:

https://forums.maxperformanceinc.com...d.php?t=771741

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Old 04-29-2024, 06:02 PM
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It’s been a loooong time, but I had a 389 425 T block for a while and just forgot about the windage tray deal.

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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!

1) 1940s 100% silver 4 cup tea server set.

Two dry rotted 14 x 10 Micky Thompson slicks.

1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.

Education is what your left with once you forget things!
  #15  
Old 04-29-2024, 06:09 PM
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for sure 64 block,has provision for block mounted starter.JMHO,worth the same as any std bore 3 1/4 main 4 bolt block UNLESS you need a SR or numbers matching code or vin to a car you might own.Nice clean block.Tom

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Old 04-29-2024, 07:50 PM
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Quote:
Originally Posted by Mr Twister View Post
IMO a freshly shot peened used block. Nice find though.
That was my thought as well, based on pics

Quote:
Originally Posted by steve25 View Post
Yes, the rings where on the pistons and the pistons where in the bore.
Crank too? Short block?

Quote:
Originally Posted by Dragncar View Post
The front 2 four bolt caps are missing the outer bolts.
Yep- saw that. Hopefully they are the caps original to the block

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Will Rivera

'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded)
'69 LeMans Vert, 350, #47 heads: Non-running project
  #17  
Old 04-29-2024, 08:55 PM
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I think the correct term was "fitted block"no crank or rods.Tom

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Old 04-30-2024, 06:00 AM
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Xs 2 with the above.
Sorry I should have been more detailed.

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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!

1) 1940s 100% silver 4 cup tea server set.

Two dry rotted 14 x 10 Micky Thompson slicks.

1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.

Education is what your left with once you forget things!
  #19  
Old 04-30-2024, 07:58 AM
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All great info - will pass onto my friend

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Will Rivera

'69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears
‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears
'64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded)
'69 LeMans Vert, 350, #47 heads: Non-running project
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