well i have 235, ported & polished head,cam, 4bbl 390 holly and all that fun stuff. i pull a 2ton work trailer and it does the job just fine.(65 mph UP hill)
here is the BUT.
$$$ the amount of money i put into it was much more than if i would have just dropped in a 350 crate long block.
the other BUT
i wouldn't change it for the world.
i love my SIX.
that's my two cents

54Daddy

http://s646.photobucket.com/albums/uu184/54dad/