I have a 93 Coupe with a 351W swap. 95 Lightning motor, stock bottom end and TF heads, intake, full length headers, etc. I'm thinking of adding A/C to the car since I live in Arizona. It currently has nothing left from the OEM A/C, except the evaporator. I don't think I'd do both the FI and A/C. I could basically use the car 8 months out of the year without adding A/C. I'm guessing A/C or FI would probably cost about the same? Maybe the A/C would be a tad cheaper.