Me too. 84 GN mostly original except for the usual bolt-ons, alky, hot wire FP, etc.. Owned her since 1988, good shape inside and out, runs great. High mileage summer dry daily driver. Unless I'm offered a stupid amount of cash It's not for sale.
I'm getting the LT 1 MAF and translator for my 84, will the 3 1/2" MAF fit with my stock intake piping? The tape measure says it will but I have my doubts.
"You have to spend money before you can make the money."
Expanding on services and display area for more merchandise would make more money. The rest would just be more overhead, use your space wisely.
It's a balancing act between the TPS (is your floor matt out of the car) and IAC. You'll have to play with both settings until you get both where you want them. There's no tricks that I know of, other than time and patience.
TPS Adjust - Adjusting the TPS
The hotwire to the fuel pump allows you to run a constant full voltage to your fuel pump.
Lower your boost or timing to get rid of the knock.
Lots of how to's and great people on this site. Keep reading and ask questions.:D
My wife is ok with the GN as long as I don't exceed 5psi boost. Anything over that and she's got a death grip on the door strap with one hand and reaching for the dash the best she can with the other. I've never really nailed it with her in the car being afraid that she'd completely lose it.