[bomelia]

That is a great story! I can see pulling a block to make a smaller bore engine...but I don't get the water jacket stuff.

I am beggining to beleive that what I have is a 390 built from a 428 block that was then bored and honed to 428 specs. The sonic tests seem to bear that out.

For my final piece of evidence, I look to the casting numbers. On this block is a C6ME- (yes, there is a dash, but nothing following.) The 352, 390, and 428 all shared C6ME-A, but only the 390 and 428 had the C6ME (according to my book.) If there was no dash, this would be a slam dunk (sort of) but perhaps when they pulled it from the 428 line, they ground it off to indicate this. Would have been better if they took the dash too.

What do you think?

Mike