ATI three ring for the race motors They offer aluminum as well as steel, I have two now(one for a 539 C.I. B1 motor and one for a B1-MC 555 C.I. Koleno block) both are seroius bracket race motors with the steel hub and aluminum outers If you need a part number let me know, I'll give you both #s
Last edited by Cab_Burge; 08/01/1501:41 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
They offer aluminum as well as steel, I have two now(one for a 539 C.I. B1 motor and one for a B1-MC 555 C.I. Koleno block) both are seroius bracket race motors with the steel hub and aluminum outers 
If you need a part number let me know, I'll give you both #s 