good job buddy! im looking at a 4bt swap into mine considering i dont plan on going in depth of a project like yourself. i plan to retain most of the front end the way it is with swapping out only the transmission and bigger rear axle. in my honest opinion, if my front end can technically support a 5.9 v8 and a 9.25 rear axle hold up to a heavily modified 5.9 v8, a 4bt wont be an issue. going to go with a 47rh auto for the transmission.