65 roll cage help?

i have 65 cuda i want to cage! i live 3miles from summit racing(yaaah)! they have cage kits! but only go back to 68'. now i know im going to be altering it cuz i want to go back thru the trunk! does any know measurements or if 68 kit will work with tweechn, mostly wandering about the main loop! or somewhere else to purchase?
Author: admin