Help with Frame and front end componant ID (hopefully)

[rp23g7]

Hi everyone, newbie here. We have a 41 Chrysler Steet rod, with a 38 Chevy front end, with a supposedly mid 70s Nova front end.

Trying to rebuild the front end and having issues with correct parts.

The original builder doesn't remember what he used, he built it 30 yrs ago, hopefully some pictures will help with identification of some parts.

I bought a mid 70s Nova Kit from PST but either they sent the wrong stuff, or the subframe isn't 70s nova.

[CPPAaron]

Being a front steer setup (gear box in front of the crossmember) that is either a 70-78 Camaro or a 75-78,79 Nova most likely.

[haircraigs]

I need to know the following for my lowrider

Can I use a CPP driveshaft with a slip instead of getting my driveshaft telescopic?
Can i use CPP adjustable airshocks instead of regular shocks for the rear?
Would it be wise to use a sway bar with hydraulics?
The Adjustable Trac Bar is it a good fit for my car and will it go with the hydraulics?