V8 swap? Or turbo slant six?

Look at your budget, be realistic, and don't get in deep enough that you resent the car and don't drive it. My first mopar was purchased at 16 (67 valiant) and I got way too deep for my budget and know how, so I got rid of the car. It was 100% drivable when I got it but I just had to have more. I think about how many years have passed since then and how AWESOME my car could be if I kept it and drove it, fixing it up a little every year.