LT1 is a great motor, if I didn't try to get collector plates on my Squarebody, it's what I would have swapped in there. it shares the same mounts as SBC, so the only thing to sort out is accessories and what you want to do for a distributor. I am not sure what the big deal with the water pump is, it spins the same direction as the TBI/TPI/vortec pump which are reverse direction compared to a regular SBC. you can also swap to an electric water pump which the LT1 guys have been doing for 25+ years. The biggest hurdle is getting a regular distributor in. you would have to buy the LT1 carb intake and get a distributor hole machined in.