Front Brake Selection Help! 1970 Trans AM

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Wilwood's site is not acting good tonight for me to check out some of the stuff..Seems liek half the time their site doesn't work well for me.

I guess we need clarification which D154 calipers you have on the rear they make a single piston,larger dual piston as well as smaller dual pistons. Factory iron D154s use a 2.5" piston as did the 79-81 TA 4 wheel disc setup. I think if you have the smaller 1.12 dual piston caliper front selection will not be as tough to balance out. Heck even using their dual piston D52 caliper on a 12" 1LE/B body rotor would probably be close to the factory F body system for balance.

Ron plug the 2.5 rear single piston caliper in with a 11 3/16" rotor 1" for a factory F body rear disc setup as a comparison also besides the disc/drum.

Also most factory power brake systems disc/drum or the 79-81 disc/disc used a 1 1/8" MC, the '81 was quick take up aluminum.Manual systems did get a 1".

Ratio is probably around 5:1 I know moving the rod up for a manual gets right around 6:1. 79-81 TA 4WD used a ratio even lower than 5:1 as they used a more assist dual diaphragm booster. Booster selection makes big difference ion the system also.