I don’t really know what I’m doing

I also agree with a few on here, big blocks aren't needed in these cars.. which is funny for me to say, when I was your age I was the guy that always ran big block cars, usually b-body mopars, but I had a few fords in there too (and a GM 429 which I have a lot of fun with guys telling me that never existed). Never had an a-body, but my brother ran a few.. and his 340 4 speed 3.55 gear Duster was one damn fun car.