Zz502/572 ?

[saxmo]

Hey guys, here's the situation. I am about to buy a boat and I NEED a good tow vehicle. I have convinced my wife that it would be better to invest the $30-40k in my 69 C10 panel truck vs buying a new dually. She understands that the panel will need to be bagged, for the extra tongue weight of the boat, and that the drivetrain will require tons of horsepower (hehe) to pull the boat... I wanna go with either a ZZ502 or 572 crate motor. Which one would work better? i.e which has more available accessories like headers, and stuff like that. My cursory look through the internet has yielded about $13k for the 572..and $7.5k for the 502... i figure with the price difference I could supercharge the 502, have more horses..and still pocket some $$$, but I am not locked in until I can figure out the details. I wanna go with an auto tranny with overdrive. Any advice on sources welcome also.