My 85 Blazer I just purchased for $700. It is legal and on the road daily. The flooring is basically rusted all around the cab, as well as where the back seat is mounted. I am seeking advice on parts, and whether or not my mig welder will be up for the challenge. Also the guy i bought it from told me it was a 350 but the firewall sticker says 5.0. Any way for me to be sure? I bought it as a beater as I have a new 99 wrangler. But I have fallen in love with the old girl. One last question, wiring, obviously rust could be damaging my wiring, but the right turnsignal works only when the headlights are off, WHY?