A lot of work, A lot of time, and a whole lot of patience....
The passenger side is very easy however the drivers side is tricky, I only did some of the drivers side wires the rest will be done this winter, but I can give you help if you need it.
ON THE PASSENGER SIDE:
I basically enlarged a hole in the shock tower and untaped and re-taped that big fat wore harness and re-routed it to the fender, it take some time and is much easier with the inner fender off but I did mine with it on just takes a little bit to wiggle it through the inner fender but really cleans up the look. The drivers side I unclipped a lot of wires and re-routed them to go inside the fender this included the sensors and large connectors over by the coil, the headlight wires, the washers stuff and anything else that was there.
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Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!
FIRST TIME OUT 12.16@111 WHEELS-UP