i got a built up 400sbc that i am gonna be sticking in there, the custom spring hanger is about 80lbs or so and is very heavy duty, im gonna be gusseting it to the frame for extra support before everything goes in, i wanted huge lift but a decent ride so i went with 8inch springs,zerorate, and the dropped hangers, plus it tilted the pinion up so it should help with the driveline too