72 chevy Pickup engine swap?????

[leos72chevy]

Hi, I seen that you may have some information or advice on the 67-72 message board about what I am debating about.I picked up this Pickup in Alabama last spring.The motor, a 350 with factory ac is getting tired and I'm thinking of either going with the ZZ430 or the 502/502. I plan on putting a TH-400 tranny and a detriot locker in the rear end and a set of Mickey Thompson I-Block tires. I want the truck to move but also be able to drive to Maine From Northeast Ct from which I'am from. Thank You Bye the way nice web page plus vehicles Thanks Again.