Update on my 46 flathead, The only cracks(other than the guaranteed stud to water jacket) were in two valve seats which have been repaired. The machinist here found my .040 cylinders were tapered about .022-.025 from top to bottom, so an .060 oversize bore will not quite cover the wear. He recommends .080 or .100 oversize, but I cannot find any pistons in these sizes. Speedway sells some 4-ring .125 pistons, but is this going too far?
This guy has worked on a lot of flatheads and says they have plenty of meat on them, but I don't want to go out any more than is necessary.
Any ideas? Or sources for .080 pistons?
Thanks,