Don't waste your time with a C4. Start looking at either a Powerglide or TH400. The biggest difference would be the TH400 has more gear ratio options. We run a healthy Powerglide with 8 or 10 clutch drum (got 2 glides one has 8 & 1 has 10 can't recall off hand which drum is in which one), straight cut planetaries, with a Coan bolt together super mega converter in our Tbird.
As for my fox body, I have a 12pt cage teamZ mini tubs, AJE Kmember, strange struts with coil over kit, QA1caster/camber plates, QA1 bumpsteer kit, flaming river manual rack, 9"narrowed 2&1/2"(each side) with 35 spline axles & spool, anti roll bar, strange coil overs, 4 link style upper & lower control arms with wish bone, wild rides upper and lower torque boxes with stiffner plates, Aerospace brakes all around, skinny tires up front and 29.5x10.5w's (may end up with 315 drag radials) on 15x12 wheels on the rear, Scott Rod Fab aluminum door panels, package tray, quarter trim, side mirror deletes, cowl panel, fiberglass dash, 10" lower "outlaw" nose, fiberglass hood /deck lid with teamZ 14" strutless wing. Will be running a BBF on spray (small shot) with a 'glide. When it's done it will certify to 8.50 in the 1/4 and shouldn't have any trouble running mid- high 8's. But have a long way to go before it's done
Holy s***, don't mind me as I follow you around and take notes. Running a 460 base motor in it? Carb or EFI? I need to figure out a direction that I'm going. I'm over the suggested limit on my 302 so will have some decisions to make eventually. I prefer to stay EFI and turbo because I have a handle on the tuning. Other than that, I'm an open book.