SmallBlock engine swap on a Mopar A-body with headers.... Never Again!

I hate my Doug's. They hit the steering box, both torsion bars, the steering linkage, and steering column shaft. The steering box interference was bad. The torsion bars are just barely touching and I had to beat the crap out of them for the steering linkage. The oil filter adapter leaks no matter what. I gave up after 3 tries with new gaskets. I installed the regular oil plate and a filter tonight. The 90° adapter is garbage. My header is covered in baked on oil.
When I put Doug's on my duster, we spent 4 hours trying to get them in on driver's side. THEN, we discovered that the last pipe was supposed to be removed from the collector BEFORE installing the front three pipes. After the front 3 bolted in, only then does pipe 4 go in around the torsion bar and back in to the collector.. Took 15 min..