FAQ |
Members List |
Social Groups |
Calendar |
Search |
Today's Posts |
#1
|
||||
|
||||
IA Block Distributor Hold Down?
I'm finally getting around to installing my IA block so today I primed it (after draining the oil and removing the oil pan to retrieve the dropped intermediate shaft) and installed the distributor.
When I put the distributor hold down clamp on, it doesn't work. (See pic below) I tried a couple of different hold downs with the same result. So what is the go to hold down for IA blocks?
__________________
No! Do not try! Do! Or do not. There is no try. - Yoda 1967 Firebird Restoration 2005 - 1/25/2017 |
#2
|
|||
|
|||
I'd be asking why the block isn't properly machined.
Block looks rough-cast where the back-end of the hold down rests, and the dimensions aren't correct. |
#3
|
||||
|
||||
Has that dizzy and hold down ever been run before?
it looks like the arc in the hold down is either too small or that the OD of the dizzy down at the hold down lip is too big. Also there needs to be a washer under the head of that bolt.
__________________
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! Last edited by steve25; 09-21-2023 at 05:04 PM. |
#4
|
||||
|
||||
The hold down came off of the 400 I just pulled out of the car.
The dizzy is new. It came with the Edelbrock pro flo 4 Washer will get added when I find a clamp that fits.
__________________
No! Do not try! Do! Or do not. There is no try. - Yoda 1967 Firebird Restoration 2005 - 1/25/2017 |
#5
|
|||
|
|||
That’s a aftermarket hold down Pontiac hold downs are not flat and don’t have a slot just a bolt hole.
|
#6
|
||||
|
||||
Example of a factory distributor hold down with the step down. Looks like it would solve your problem.
__________________
Ken '68 GTO - Ram Air II 464 - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac (build thread | walk around) '95 Comp T/A #6 M6 - bone stock (pics) |
The Following 3 Users Say Thank You to Verdoro 68 For This Useful Post: | ||
#7
|
||||
|
||||
Looks like I need to find my factory style hold down. The one in the pic came off of my 400 & worked just fine on it, but the IA block must be different. (correct?)
__________________
No! Do not try! Do! Or do not. There is no try. - Yoda 1967 Firebird Restoration 2005 - 1/25/2017 |
#8
|
||||
|
||||
I have an OE style clamp like the one picture above on my IAII block and it works perfectly.
__________________
70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear https://youtube.com/shorts/gG15nb4FWeo?feature=share |
#9
|
||||
|
||||
I believe that the pedestal it sits on is taller on the IAII.
__________________
70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear https://youtube.com/shorts/gG15nb4FWeo?feature=share |
#10
|
||||
|
||||
Looks like the wrong hold
Down as everyone has said get a factory style no issues
__________________
1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
#11
|
||||
|
||||
I found a factory clamp and that solved the problem.
I do think that the IA block IS a little taller than factory though. Thanks1
__________________
No! Do not try! Do! Or do not. There is no try. - Yoda 1967 Firebird Restoration 2005 - 1/25/2017 |
The Following 2 Users Say Thank You to Speargun For This Useful Post: | ||
#12
|
||||
|
||||
That looked like a Chevy clamp maybe just made it on the 400 block Glad you figured it out
__________________
1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
#13
|
||||
|
||||
I had one repop factory style hold down bracket that was soft. It slowly flexed and loosened over time again and again. Found a factory one and no issues.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#14
|
|||
|
|||
I have had 1 or 2 of the early IA blocks that had some minor issues in that hold down area. First, try a factory hold down that has the legs bent down like in the pics. If that does not give you enough clamp to hold the dist. tight, try this. I had an IA block that needed an ARP stainless stud installed. Before I installed the stud I had to bend it 20 degrees or so to get the clamp to fit the distributor right and clamp it tight. PLEASE, if you go the stud route, bend it FIRST, then install it. If you strike it to bend it while in the block, you might break the block back there. Then you have a real problem.
|
Reply |
|
|