['68 Newtricks]

Is this 12" all spring lift? If so, you are in for new springs no mater what. I would look at Tuff Country 6" all spring lift kits. Make sure the 3/4 ton swap includes a 14bff for the rear, since you mentioned towing. Anything less would be zero improvement. (14bsf slight improvement)

Some things come to mind.

drive shaft length (rear axle will change this, so be careful)
T-case drop
shock length
brake line length
steering correction or removing steering correction (if it's not crossover, it's probably scary sh*t at 12" of lift)


lol 12" of lift on 1/2 tons, oh boy