[blykins]

The thin spot is about an inch from the deck itself...close to the top of the bore. It's on the bottom "side" of the cylinder though...on the side of the cylinder that would be closest to the header...on the thrust side I guess I could say. That's what bothers me. I have always heard the cylinders were thinnest close to the top...and sure enough...it was.

Gessford said that .100" was the bare minimum for a cylinder wall thickness, and if I do take .080" out of the diameter of the cylinder, then taking .040" out of that side would leave me with .096". I think that's really taking a chance.

I was doing some searching last night, more than likely Scat would custom grind me a longer stroke than they offer (if I went with a .060" over block, I would need a 4.020" stroke crank) if I wanted to go that route....and also unbeknownst to me, they make some really nice forged cranks for FE motors...even in stock strokes. So I could just bore the block whatever it took to clean it up, and put a stock stroke back in it.

Didn't someone say that there were a few Cobras with 390's in them at some point in time....?