Have not had time to do a compression test yet because the truck is in storage not at the shop for the moment until I finish the current customer build. The pistons are flattop forged pistons that came with the fed mogul rebuild kit but I don't know the piston deck clearance.The block was not decked so should be stock. Stroke is 3.750, bore is 4.350 combustion chamber on head is 78cc. The gaket that came with the trickflow heads is .051 with a 4.380 diameter, but the builder said he used the fed mogul gasket for some reason. Not sure why maybe it was the thickness IDK. If anyone can find the info on the fed mogul rebuild kit gasket that would help but I still need deck clearance to get compression. The cam was not degreed when installed. Believe it had a peg ,and you just lined up the dots on timing gears will look at pics and see. Has a comp cams double roller timing chain. Just spouting info at this point dont know if any of this helps