Just for giggles I considered your budget, and added with a short list of parts.
Of course you can save on a few items, so you should shop around.
summit racing should have most of the parts, I hope you can be discounted since you have a shop. Planning will be everything.
Take the time to shop around, and ask questions.
I think the paint should be a priority, silver with white pearl inlay.
That's what is going to make her happy.
I would guess about 3 grand for that. Next you should upgrade the brakes all disk breaks for safety. That's about 2 to 3 grand if you don't cheap out. The posi rear, and gears could be a big expense if you get one pre built with a chrome rear or a ladder bar setup, but you can save here, if you buy used . A tremec T56 6 speed, and the other parts you will need, such as a drive shaft ,and bell housing will cost you about 3 grand. maybe a little more.
Tougher T56 Transmission - Tech Article - Chevy High Performance Magazineoh Yea rims, and tires 2,500 more. but you can cheap out here and use the stokers, and save a few bucks you might need in the future.
Interior about 2 grand, with nice black racing seats, and a cobra dash cluster. The engine can be bought from Ford motor sports for a good price. Add heads intake, and everything else your talking close to 7 or 8 grand. total cost 19 grand with a grand left over for the top. The biggest problem will be spending to much, because you are missing parts that you forgot to buy, or didn't know you needed them.
Just remember keep smiling...
