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#1
12-04-2023, 06:15 PM
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LS Rockers
Maybe a dumb question. Maybe the centerline from the trunion to valve and trunion to pushrod are different? Just curious. They are a lot more affordable. Maybe the more experienced forum members can tell me if this would work?
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#2
12-04-2023, 07:44 PM
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Why stop there? I think a Pontiac fella ought to assess the total LS deal grafted onto the old iron head:
Valve stem size & guides. Valve lengths? Beehive springs and them tight STOCK retainers, keepers. No Ti retainers. Rockers Pushrod diameter Roller Lifters. Was my next thing to look at but sold my last set of Heads (48's). |
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#3
12-04-2023, 08:20 PM
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For what Pontiac heads, pre 67?
__________________
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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#4
12-04-2023, 09:04 PM
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Actually, I’m looking at aluminum d ports.
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#5
12-04-2023, 09:07 PM
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Actually, I’m looking at aluminum d ports. Thanks
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#6
12-04-2023, 10:59 PM
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I’m using BBC ones. Much cheaper and 1.7
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
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#7
12-04-2023, 11:34 PM
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Look at Crower 0.090 offset trunnion BBC . BBC rocker bodies are 0/120 longer trunnion to roller tip than BBC
Also most folks when they measure actual ratio get 1.70+ for Harland Sharp 1.65s.
__________________
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 |
| The Following User Says Thank You to Skip Fix For This Useful Post: | ||
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#8
12-05-2023, 07:28 AM
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Ford Windsor rocker arms usually have the same dimensions as Pontiac. LS isn’t anymore affordable than a Ford Windsor. Harlan Sharp for a Pontiac are decently priced IMHO, Crower are expensive but among the best. Comp Cams Ultra Pro has some nice Ford Windsor rockers are outstanding on Pontiacs too.
If you had a rocker arm you could mock it up and try it. Seems like a waste of money to try something without more info. Ford Windsor and Pontiac is about .060” longer from the trunnion to tip against a SBC. A BBC is longer, don’t know about a LS. Last edited by Jay S; 12-05-2023 at 07:35 AM. |
| The Following User Says Thank You to Jay S For This Useful Post: | ||
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#9
12-05-2023, 10:34 AM
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I do have a Crower 1.6 SBF that is shorter than my Pontiacs not sure if they all are. There are also 1.33 break in rockers for a SBF I have used-got from Paul Spotts.
I have a bunch of singles as I did mock a bunch up looking for a higher ratio. Ended up with the Crower 1.8 offset trunnions on my E head 455. A local buddy used some on one of his iron head motors. They usually do not require grinding the head for pushrod clearance.
__________________
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 |
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#10
12-05-2023, 12:22 PM
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Good info. Thanks to all.
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