Your first gen is super clean. I have an '84 that is a DD like yours. I have 4" pro comp springs, but just purchased some all pros like you because right now they're 25% off. I am not going to use a spring hanger on the front because I want to keep everything as stock as possible and the all pro guy said i could do that. The only thing i'm worried about is that my pinion angle and driveshaft length will be an issue like yours. Im wondering what you did to fix this problem. I would post pics of my truck but i don't have enough posts yet.
I am soo sorry that I never responded back when you posted. I had some "life" issues that has taken up till just recent to straighten out. What did you end up doing?