I restored a '90 several years ago. When it comes to the motor, I'd recommend rebuilding your 350 and going FiTech right from the start. I modified my TBI system(FItech and the others were just getting started when I did mine)as recommended by Harris Performance...I did everything he recommended. After two or three custom chips we got it right, but I it takes a lot of detail work and someone who can burn chips and read your ALDL logs. FItech, on the other hand, will get you more TQ and HP, and you can tune it yourself, real time, and all the info you need will be on numerous websites. It took me over a year to get mine dialed in right, my other truck has FI tech and it is so much easier. FItech is good, there are others just as good or better out there. Just make sure you can tune on the fly and get datalogging in real time. Just my two cents. Also, I've got the GM wiring manual for the 90, when you get to electrical, it's all yours, just let me know and I'll get a PDF to you. Also, remember, if you ever want to box your frame in the weak spots, do it now while everything is stripped off. One thing I wish I would have done is box up the front..you're building on old metal, and it's probably fine, I'd just rather know it was strong enough for whatever I do. Enjoy, it's a learning experience!
