I went with PST (Performance Suspension Technology), usually on the back cover of Mopar Performance for the front end rebuild kit for my 66 Valiant wagon. Great customer service, great pricing and quick. I'd highly recommend them!
Same here. The polygraphite bushings are a little harder on the ride quality, but are better handling IMHO. Torsion bars & rear leafs I got from ESPO Springs & things, great people to deal with.
I don't know anyone who does seats but most shops could make the buns if needed. do a Google search for Auto Upholstery. Franks is on rte 32 in Franklin. there's another in New London.
The engine, bearings for the 273 shouldn't be an issue. If you need to bore it out and replace the pistons you will have to look around. everything else should not be an issue.
