470 vs. 500?

is this going in an A body?
A friend of mine went 408 and did not like it....on street tires he
gets nothing but tire spin in 3 gears!I can't imagine a 500 working
in an A body.
Another friend went 372 in his '71 Duster with a best of 10.47 ...running
slicks though and shifting at 7800.
I know,not much help but I have no experience with big blocks.