Hello
I felt that i must reply to this one. The engine that i currently run in my 70 LS-6 car was purchased many years back and is a 1972 crate LS-6 (all date coded) #289 block, #291 heads and was never taken apart when i got it, hell it is still the standard bore with the O.G. pistons, crank, manifold. the only thing that i did when i rebuilt it was grind the crank 10/10 CRR on the deck with no Vin # just thought i would reply. Geoff.
