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Old 08-18-2020, 08:23 AM
69hardtop 69hardtop is offline
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Join Date: Jul 2008
Location: Plymouth, MI
Posts: 182
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Quote:
Originally Posted by Tim Corcoran View Post
What's wrong with the rocker arms your currently running? After you have the new cam installed you will need to check the valve train geometry to determine the correct pushrod length. You may have a RAIV cam in there but no way to know for sure. Being your engine is a stock 69 400 your compression may be a little on the high side. If your cam has a lot of duration and that may allow it to run today's pump gas without detonation. If you put a smaller cam in there you may end up with too much dynamic compression and get some detonation that could cause damage to your engine.
Thank you, pretty much one of my worries. If indeed my heads are original stock with 72cc I really have to think through what I want for a build