Another former SHO owner weighing in...
I too owned a '91 SHO which I bought new in May 1991. For you SHO guys, it wasn't a Plus Edition but was nonetheless equipped with the rod shifter and fiberglass "dome" hood. At the time there wasn't much in the way of go fast parts, but the addition of a custom exhaust, cold air I fab'd, bigger MAS, chip and u/d pullies seemed to help. It pulled very hard in the upper RPMs and was a hoot to drive. My three highlights of SHO ownership were (a) trying to explain what the car was to the shocked CHP officer that had pulled me over after watching me enter I5 at Katella and get on it, (b) the cool group of SHO fanatics that used to meet (I think they still do?) at Vadim's SHOShop in Huntington Beach, and (c) driving the absolute crap out of my SHO at 5AM on Christmas Morning/December 25th 1991 from Morro Bay northward on Pacific Coast Highway all the way to Monterey (a very curvy route), and not seeing one car the whole time. I was using both lanes, doing 4-wheel drifts, the whole nine yards. I hadn't had that much fun since my old '70 Porsche 914-6! When I finally pulled into a Chevron station in Monterey I was shaking so bad I nearly fell while trying to get out of the car, and the attendant asked if I was okay ("Oh yeah...!")
I would probably still own the car had it not been for that fateful day in mid-1994 when, while driving the SHO to meet my wife at her work, I passed Beach Oldsmobile/Mazda's used car lot, and saw a GN sitting out front...the SHO soon departed, and that GN is still with us.
At the last Street Legal Drags event that were held in November at CA Speedway, four SHOs showed and parked near my pit stall-- a stocker, two V8 models and a blown '92. All very cool guys; unfortunately, the blown SHO snapped an axle on his first pass.
Morgan
'87 GN; high 10's...finally!