Suspension Q's?????? Options

[East coaster]

Ok, Here's the deal. I'm building my car as a street machine, not race. If I ever autocross or track it, it will strictly be for fun/education and don't care if it's the least bit competitive. I want to maintain a decent street ride too. So with that goal in mind, I have a couple of suspension Q's. I'm trying to decide spring rates and wanted some opinions from the "Garage".

Here's the "known" parts, the car is a 3.6L 6 conversion with '85 Carrera front end, Tarret front sway bar and stock rear end with stock sway bar. I do have a limited slip trans (in case it matters?)

I'm ready to order front torsion bars (since I just took the front end apart and found 1 rusty bar) and would like opinions on what diameter? Also, I have a brand new set of progressive 165lb rear springs and I'm not sure I want to use them, so opinions on rear springs too????

Thanks!!