which early CB calipers interchange?

[runmikeyrun]

I'm building a CB500T front end for my CB350 and I was wondering if I need CB500T front calipers or if I can use my 350 caliper or maybe one from a 550 or 750. I have read on here that the rotors between bikes are slightly different diameters and are NOT interchangeable but I'm not sure about the calipers. CB500T calipers are more scarce than the other bikes.

Any help appreciated, thanks!

 

[o1marc]

I'm not sure of different years in that time frame but all the 1975 CB350/4, 500/4, 550/4 all used the same part # caliper. The 750 shows a different part number.

 

[runmikeyrun]

awesome info, thank you!!!