80 Mustang front brake rotors and calipers

[TC65]

Wanting to change rotors and calipers on our Mustang race car . We have been using the 9 inch stock rotors and calipers. There is alot of drag using these. Is there any aftermarket rotors and calipers?
Been thinking about changing spindles and using the 10 inch rotors and calipers. Would like suggestions and any help on this.

Thanks
TC65

[car62]

if you use the 10" rotors you can get them cross drilled and slotted