Having been a modding type of guy for many years now.. I'd suggest one thing that you absolutely must decide on. It'll make your efforts far more rewarding over time.
First and fore-most decide right up front what it is you want to accomplish.
Be it a 1/4 mile ET or what ever. Just define a goal that you want. That way you will spend accordingly and be happy with the results.
I've helped a guy do a 4cyl turbo on a S-10 before. We got it working and up to 10psi. But he didn't plan on all the other issues that would come up and wound up just selling it because there was so many other supporting mods that it was needing... and he had not planned for. Things like clutch upgrades.
LOL.. he had not planned on that at all! The very first time we cranked the boost up his clutch slipped and just killed the whole "mood".
An open ended project will never be completed and/or it'll drain your money to the point of one day just being tired of the bucket of parts. You'll wind up selling the whole mess for 25% of the money you have into it and get no return for the time you spent.
Trust me on this one... plan the project. Define goals and you'll feel good about the whole thing. It keeps you in line with timing, spending, and having realistic performance.