I'm installing the grenada disk brake swap (from www.CSRP.com) on a '66 mustang, to go from 4 to 5-lugs. I would like to know if any of you have used this swap and if so, what wheels have you used with it? I'm thinking about torque thrust II's (15x7, 3.75 Backspacing, with 50 or 60 series tires).

 

Oops, its not csrp.com it's http://www.discbrakeswap.com/ sorry

 

If you use Granada rotors, the hubs are quite large, making it impossible to use most 64-73 stock wheels.

 

3.75" backspacing on a 15x7 wheel with 60s on the front of a 66 will be a problem. probably gonna get a wheel rub. Need a deeper backspacing to pull that wheel in further.

 

I have Granada brakes with Magnum 500 15x7 4.25 backspacing.

 

I have that swap with 15x7" 3.75BS 205/60R15 in front no problem
new wheel I'm buying is going to be same size again
but if the TTs come in 4.25" BS as well, it might be an idea to go with them (be on the safe side)

 

Thanks for the info gentlemen. I just ordered some 15/7 tt2s with 4 inch bs. Couldn't find them in a 4.25

 

Do you have any sort of drop springs, or upper arm relocation?

 

in front just finished shelby drop (2 weeks ago), but no drop springs. bought the springs 3-4 years ago. they were sold at NPD as heavy duty V8. car had a V8 and 6cylinder springs so had to change them

 

Maybe that's why. I had the 620 coils with the 1" drop.