flooding out FC3S4 N/A

[NoDOHC]

You may have a serious vacuum leak.

My '86 was exactly like that when I got it, the vacuum line to the brake booster was MIA.

If the car runs when flat on the floor and not under any other circumstances, it is likely to be either the TPS, MAP, or a vacuum leak.

I guess I could see the vacuum line to the FPR missing or improperly connected.

Does the car still have all the emissions intact?

I think that a fuel pressure gauge would do you a lot of good (determine if your FPR is bad or malconnected or you have a plugged return line.

I have known people to try the ingenious plan of crimping off the return line to get more power (some old truckers used to do that with reasonable success on ancient diesel engines). It doesn't work with a gasonline engine. Infact to get more power out of a stock rotary, you need LESS fuel.