Ridetech for 69 Firebird?

[jlwdvm]

My 69 Trans Am clone project is getting to the point where I have to start making decisions on rear end, wheels-tires, suspension, etc. I an finishing up installing a Chris Alliston 6-point roll bar. I already mini tubbed the car this winter. It has an 8.5" rear in it at the moment that will probably be changed out to something that can handle 500+ Pontiac horsepower. I'm thinking about a full ridetech front and rear suspension kit with coil-overs. I will be using a stock front sub frame. Questions are: Do I run a stock width rear if I want 335 tire; are there tire width limitations since the lower control arms bolt up where the stock leafs would on the rear end; what size of tire could I run without adding true-turn, does the narrowed frame rails affect the rear 4-link attachments? Any other input would be great!