Just Bought a 360

Thanks rumblefish. I havent cc'd my heads yet. They're still laying in the shop waiting for me to clean them up. I was just trying to get an idea of where I might be at. Gotta' decide if I want to run these heads as is & wait for a seat to fail from unleaded gas, replace the seats when I have the valves done, or look for a later head with hardened seats & a smaller combustion chamber. I've read the newer heads will work better because of the combustion chamber design, but I already have the J heads & they're in good shape. They were pulled in the mid 1970's & had a valve job done on them & have never been used since then, but I think the guides might have been knurled so they probably should be replaced.