440 what am I missing here?

Garrett Ellison said
Yes, right on and thank you! It’s a little hasty to say grinds A/B/or C at this point. Even though the 74 cc chambers help, if it has some old school speed pro pistons that are set .080 below deck combined with a .050 head gasket (for example, hopefully it’s nowhere close to these figures) all these choices may be too large.
Knowing the the cranking compression is key here! Being we have a cam card, knowing the installed ICL would be a bonus for calculating the actual compression, to within a couple of percent anyway.

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