I have no Idea where to start

Hopefully you will get it up and driving soon, the bouncy front end is a concern. Does it have power steering/power brakes? A good build to review is posted by MomsDuster, he has done a great job with a Dana rear axle and a QA1 front chassis set up. For future reference, if you stay with the torsion bar suspension (I still feel it to be sacrilege to use anything else under the typical mopar build, but that's just me) the big block torsion bars are barely adequate for a six under normal driving conditions, and unless it's a drag only car, it's advisable to use heavier bars to be on the safe side. But drive and enjoy it for the spring and summer first and get a feel for it, you'll probably change your plans several times before you decide on how you really want it to be. Find a factory service manual. Unless you absolutely need it, you may be better off to set up a non A/C accessory drive arrangement first, and plan on A/C down the road because your a/c options are going to be aftermarket modern refrigerant systems.