True, but the stock maps are pretty rich to begin with so, it reallys not going to make that big of a deal. Get a adj FPR and raise the fuel pressure a little.
HINT, in my opion an FPR and gauge is the best mod. other then getting a tach on dx's that don't have one (vent: that's the stupid thing ever, not having a tach on a car with manual transmission)
IF you go obd1, your going to have to get a bunch of shit which will cost you a bit unless you buy used and find really really good deals. I haven't looked in a awhile, but I've never seen a p28 go for less then 130.
I've used turboedit and I like it a lot. Missed around with uberdata ( a little) and didn't like it as much. I say if you have obd0 just use obd0.