Truck manifolds on Dart Sport?

I did a search but didn't find the answer I was looking for. I bought my 360 Dart Sport used recently, and it came with some beat to crap, very low hanging headers. Since I know it can be a pain to install headers with power steering and power brakes, I am considering using factory exhaust manifolds, but obviously want something with better flow than the original LA 360 logs. A local buddy has a set of manifolds that came from a 360 truck (unsure of the year). My question is - are they likely to fit? Also, will they be any better than the stock Dart manifolds were? I'll be driving it on normal streets, no real racing.

Thanks!