pushrods
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pushrods
hi guys, i just recently rebuilt a 1974 390 and put it in a 78 f250 4x4. I bored it out .30 and put in flat top pistons that are 9.5:1 and a 282-292 duration cam. the problem is now that the motor has about 2 miles on it and has bent three pushrods.the original cam was a 260h, so i am not sure of what lenght my pushrods are now. any ideas?
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Joined: Feb 2004
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From: Fort Rucker, AL
How long are they? Do you see where I'm going with this? The pushrods you had were maxed out with your original cam. Then you went to a more aggressive cam and ended up with too much pushrod. Just my .02.
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Elder User
Joined: Feb 2004
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From: Fort Rucker, AL
It's just an opinion. Take one of your original pushrods to a parts house and compare it to the different sizes or go to a machine shop and have them measured. I wouldn't take what I'm saying as a remedy until some of these other guys chime in with their .02.