measured pushrod lenght and cam up with 10.5 turns on intake (comp cam pushrod length checker) and 10.75 on exhaust what pushrod should i use. if i do the math it comes out to 7.4 on the intake with .075 preload and 7.4125 on exhaust with .075 preload. so which do i get 7.4's or 7.425's. motor has lifter noise or some sort of top end noise. oil pump oring is good and oil pressure is 40-50 at idle hot. any help would be great

 

Sent a PM. You could use the 7.425" pushrods with stock lifters, but if the noise is due to an aggressive ramp rate on the cam not sure it will quiet it down. I guess its your call if you want to try it, but the preload values will be fine if you do. If you have trouble finding that length, send me a PM. I just had trouble finding 7.475".