I'm pretty sure nobody's worried about your credit card number You'll find a wealth of knowledge on here and everybody very much willing to share it. As far as being reachable, most people use the PM function to discuss pricing of parts and such rather than air a negotiation. All I was saying was that if you're actively looking for parts and prices, you should make yourself available via PM. Anything payment wise beyond that is up to you and whoever you're working with.
As far as rebuilding the 7.4, all the parts are available to do what you want. I'm not sure, money wise, if you'd be better off buying a used/reman 502 or rebuilding the stock 454. It really depends on what you can buy a new short block for. I would guess you can get a stock reman 502 mag short block in the $3500.00 range from a reputable builder. To have yours re-done with new crank, rods, pistons and the like might be a little cheaper, but probably not a huge difference. If it were me, I'd probably go with a reman 502 short, and have my heads reworked and choose a good cam.