just bought a 90 Gt with a gt-40 crate, I was told the timing was off, so I got it fixed, when I bought the car it was running around 29 pounds of fuel pressure. the timing was set at 10, and was corrected at 14, I changed the spark plugs, and wires, I noticed that cyc. 4 and 8 with running very rich, and as you go to the front of the block the spark plugs were running really lean! everything was running okay after the timing, I was idling around 1k, now I start it up and its loping around 500, and the fuel pressure is around 42-43 pounds