Motion Replacement Engines

[vettebuilder]

HI. I am a brand new member and I have enjoyed this site for a while. So I joined to become part of this great community. I do have a starting off question. Could someone PLEASE explain to me...if your 1972 Corvette was converted at Motion from a small block to a 454 big block, what stampings if any are on the front pad and what casting number is on the block? I have read so much about CE blocks used and L-88 blocks I wondered what block and stamping was original for those cars converted in the early 70's. I read that cars ordered from Baldwin came with 427 engines that Motion upgraded. But what happened if you had a small block and went to Motion for one of his 454 conversions? Would the stamping pad be blank, and were they ALL 512 block castings?