Keep the V8!!
Sounds like you are just frustrated, step back and analyze this for a minute. It is always better to get another V8 like the one that is in your car before trying to swap in a totally different engine/tranny/wiring/etc... to fix a problem like your are having. I understand how you feel, been there myself and it is easy to panic.
Follow Scarab's advice....you should be able to get her running by following some simple methodical steps. Don't forget you have help, just get in touch with one of your local HBZ bretheren and they will help you out.
But! If you do decide you need a new motor, just get another V8.
My 2 pennies