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Hello all, ive got an l67 with xpz hot cam , ls7 lifters & 1.6 yella terra roller rockers pt no yt6669. Im useing stock thickness head gaskets & neither heads or block has been decked(skimmed). I was provided with the cam 7100"& 7050" pushrods but not sure if they r going to fit due 2 new rockers, without measuring first. Is any1 running the same or similiar set up? I would really like to hear what length pushrods u went with. thnxs in advance...
 

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I just went through all this with my top swap build. Buy a pushrod length checking tool and install it on at least 3-4 cyls and get your zero lash measurements then add the amount of desired pre-load for the type of lifters you’ve used.
My pushrods had to be custom made at 7.200” for my build.
-custom head machining/oversized valves
-YT 1.7’s
-Cometic 4 layer
-Comp OER lifters and 125 springs.
-Intense stage 2 blower cam

Too many changes for standard size rods. From what I hear the base circle on that cam have different diameters so you’d need two different length rods for intake and exhaust so I’d measure 6 rods to get the average of 3 for each.
 
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