Take the 2nd one and rebuild it ,,,I have a 56 235 in my 46 1/2 ton, and I rebuilt it before i put it in, mine was a 216 before I swapped it.....but be careful what u buy to rebuild it... mine cost almost 6000 to rebuild....because i bought all the hi performance stuff, and it still runs like a 6 cylinder.... But it still has alot more power than the 216 and runs smoother
