brake proportioning valves questions

hi y'all

need an answer to a question. i got a 67 cuda, but the body is 67 cuda, everything underneath is going to be 74 dart. i am using the big disc brakes off the front of a cordoba, and the big drums off the rear of a cordoba. i have the large bore cordoba master cylinder, and just ordered my brakeline kit for a 74 duster from inline tube. i was told this car was a 108" wheelbase like my cuda is. anyway. i have the stock drum brake proportioning valve from the old cuda brakeline system, and i have the proportioning valve from the 74 dodge dart donor car

can i use the dart proportioning valve with the bigger cordoba brakes? should i try to find a cordoba proportioning valve? could i even use the old barracuda 4 wheel drum proportioning valve? id like to use the right one, and only have to bleed the system once.

thanks in advance
matt