18 year old with Mopar project NEED ADVICE!!!

OK, I read your response but there's not really an answer there. I/we know what things cost, what I/we don't know is what you have to spend. I had a big problem when I was a teenager with viewing large projects from exactly that position: cost vs available funds.
If you were my student and want to run a V8 bracket car that you own and pay for - I'd advise a 5.9L Magnum base, tf904, 8 3/4 combo. Bracket cars are not about high horsepower - at least not at first. Some truly great ones never are. Spend on the chassis, suspension, and rear axle. Expectation should be low 12s. When you have to pay it all yourself, you have to crawl before you walk or run. That will get you racing quicker than trying to build a 10s car from nothing on an 18yr old's wallet. Trust me - I've been there.