I installed a set of Moog Aerostar springs last fall and dropped uprights from Fatman last week. I have 15" bias ply tires. I know this setup isn't uncommon, but I can't find mention of problems with it. I have roughly 1.5" between the top of the tire and inside of the fender. It's hitting pretty badly any time I cross RR tracks or mild bumps. If anyone else who has this setup (or a comparably lowered front end) can offer any info or additional mods they've had to do, I'd really appreciate it.
Wheels that offset the tire to the outside can contribute to your problem. Check to be sure that yours are zero offset - equal space from rim to mounting surface front and rear.
Thanks. If it helps, I should have mentioned I'm running the factory wheels with 710-15 tires so I'm not offset or running wide tires.