Best performance / Mileage?

I guess, like usual, that my question wasn't clear.

I know that my current build is not the best. I will be the first to say that and the compression would be the first thing to get fixed.

That being said, I need to run what I have for now. I am thinking about the upgrades for later.

I'm wanting something that I can drive daily, get decent (mid-teens) mpg, and still have it get with it when mashed.

I had to make some concessions, due to using what I have on hand.

I may build another car. The process of building them is where the thrill lies for me. I love building cars and I use them to teach my kids.

Thanks, ROB