Installing a roller cam in a non roller block is not a slam dunk. The new issue of STOA news letter has an article. Hugh is using a roller block so it’s easy. It probably is going to cost $$$ and a lot of modification, probably more than a new bellhousing. waterpump, damper and distributor gear to convert to a roller block. Use your early model block and cam with Comp cams lubricant, break in oil and use their oil, Brad Penn, or Joe Gibbs motor oil, afterward. Bob ( the oil expert) should chime in on this one.