I raced (car being rebuilt) a '70 AMX with 634 HP AMC AMX in SS/H using Cal-Track Springs, bars and AFCO DA shocks with 9x29.5" slicks. So probably not much different than yours (Ran 10.00's). I was using AJE wheelie bars which I highly recommend for your suspension. Do not use solid bars. I've tried. Alternatively, I would thing the Ken Kier or even Calvert wheelie bar mentioned below would work. I like the idea of a single bar.
I think 60" bars are over-kill, some kid will trip over them and I think on a 9 or 10 second car they rank right up there with 4" OD exhaust tips on ricers.
That's my .02!