My problem is solved and I will be able to sleep tonight!!
I was reluctant to go 80 over, but armed with the info from CNC Dude, I talked to my builder. He told me that he remembered that he had an old 250 block under his bench that had been sitting for a few years. He pulled it out and checked the bore and it was standard size. He will take it out to 30 thou over, and with my speed goodies from the old block, and new rings pistons and bearings, I should be good to go. This builder has built many 250's for "Old Time Racing" here in B.C. They use 250's in their race cars. I am confident that he will do a good job.
Maybe this is a time for Larry's lump ports.
Thanks to all of you that responded to my post.
Al
Al
