I got it just like this and only know what I was told, and what part numbers I can see. As I know it was mocked up in a 68 roadrunner, and from perch center to center it is 36”. And from outer flange to flange with no rotors on the axles is 53 1/4. Any more questions let me know, thanksHow narrow and what application are the cal tracs for?'
Please get measurements for the perches center to center and a OAL axle flange to axle flange. That would be super helpful.