I have a 72 (i believe) 455 that I got from a toronado. Before I tore it down, It spun freely with no issue. I was going to build it up, but no longer need it. The block has already been cleaned and Magnafluxed. To my knowledge it is standard bore (99% sure of this)

The only thing that is wrong with it is the tranny bolt threads. 2 bolts snapped off.But both are now drilled out. I was able to drill one out with threads still in tact. But one needs to be tapped and the other needs welding as the tab cracked. (i attached a pic before i removed them)

I got a guy coming for the heads and intake. But I still have the rest.

Any questions just ask!

Shoot me a price