318 engine build

This would be my first engine build. My dad built up his 1970 340 3-speed Duster back when it was new so I'd have a lot of help from him. My goal is to get enough HP and TQ that the car would be enjoyable to drive (not tryin to be the fastest car on the street) at the same time relatively light on the wallet and not too expensive to drive gas wise. Hense why I thought about building the 318 I own up.

Am I goin in the right direction with this. I did think of finding a 360 but that means more $$$ off the bat when I have a very clean 318 already.