Yeah, I did the same thing. I'm sure my cam is a sh%^tty choice, I'm still running my ORIGINAL 7.25 rear end and stock converter that came with the used engine/trans from a 1973 motorhome. Oh, and a lousy Torker intake too. I bought what I could get my hands on because 1) parts are expensive, 2) parts are harder to get in Canada, and 3) parts are even MORE expensive in Canada.
But every time I go for a drive, I'm happy and I get lotsa nods. So build what you want.