Looking for a little info concerning push rod length. Assembling a 383 sbc that has had both the heads (AFR) and block resurfaced. How much was taken off I am not completely sure of but I do know it was a minimal resurface cut. I am also using a very thing gasket, FelPro 1094 at 0.015" compressed thickness. The last kicker is that I will be running a retrofit hydraulic roller cam with retrofit hydraulic roller lifters. Now these lifters are higher than the hydraulic flat tappets so I have read that the use of a shorter pushrod is mandatory. Also the fact that I have had both the block and head resurfaced and running a thin head gasket would mean I would need a shorter pushrod yet. I will most likely end up buying an adjustable pushrod to verify proper pushrod length, I just don't know what numbers I will be looking at and which adjustable pushrod I will need?