before I realized I had these C heads ( and I don't have them off the eng. yet so don't know if they are cracked or are any good). how can I tell for sure if they have been previously milled or not and how much? is there any type of indicator to measure from? I had a set of C1TE truck heads rebuilt with larger valves, better springs and retainers etc. , and my brother is going to do a little port work on them for me. I am trying to build a 312 for my coupe. have the block, crank and rods. bought an Edelbrock 257 2x4 intake, some nice aluminum v/covers from N.Z. . I do not think anyone in the U.S. sells them. work on the eng. will be slow, as I am retired and live on what amounts to an allowance, can only spend so much money at one time. have not settled on cam selection yet. need the eng. to be streetable and dependable. would like a bit of lope at idle, yet need to be compatible with an automatic with out a high stall converter. ( yes I know real hot rods have 3 pedals, but had to make an exception in the chopped and channeled car, no leg room to work the clutch with a bad back and a bad left knee ) I also have not decided if I am going to run 2 teapot 4 bbls or not. I am not very familiar with them. last one I worked on was over 30 years ago, but I know the guy to go to here on the barn to get them straightened out. I may use a set wcfb's if I can find a matched set at a reasonable price.