Changing leaf springs, potential issues/ driveshaft angle?
I recently got my 1970 Mustang (has a T5, might be relevant) back together after fixing rust, rebuilding the front suspension, installing a 4 barrel carb, and a few other things. It's driving great, but the original rear leaf springs are soft and sagging so my next project will be installing the Eaton 138# 2" lowering springs I have.
I'm leaving on a road trip next Friday morning, and I'll be working Monday to Thursday until then, so I just have this weekend if I want to change the leaf springs before the road trip. I think it would be good to change them if I can, I'm concerned about scraping over bumps with three people and a bunch of luggage in the car. However, I'm nervous that I might run into an issue such as the change in driveshaft angle leading to vibrations. If that happens I probably wouldn't have time to sort it out before the trip.
Realistically, if I go under there and just slap on some new leaf springs (which I think will raise the rear of the car a little) what are the odds that it will cause some kind of problem?