Guys, just need a quick check here. I have a brand new 408 shortblock with unmilled LS3 heads (with L92 head gaskets) using LS7 lifters and OEM ls3 rockers. I used the EO/IC method to check pushrod length with solid lifters and came up with 7.425 on a cam which is about .63 lift on both sides.

I have already started up the engine and the valve train sounds good. Im just slightly obsessive, and like to second guess everything I know, they make drugs for that ****, lol. Anyhow, I just wanted to check and see if any others were running similar setups and ended up also using a 7.425" pushrod.

 

how much preload did you have with the 7.425 pushrods?