I'll post another vote for the XJ6 front and rear suspension. In my opinion, a Camaro T5 ain't gonna stand up very long if you do any power shifting or side-steppin' the clutch. Take pedal assemblies out of a pickup truck. You may need to reinforce the firewall. If you need to move the motor back a little, cut the firewall out and weld in a wheelbarrow. Makes a neat-lookin' indentation in the firewall with smooth corners and all.
1967 Chevy Camaro Project Wheelbarrow Firewall Photo 27