Ian, you have plenty wire to get all the way to the pump. I take it all the way up to the pump. I remove the fuel pump access cover and take it all the way to the connector. I use some terminals that accept the heavier guage wire that is on the MSD unit and I plug it right into the connector. That way you don't go from a large wire to a small wire (I will send you some if you would like). (For what it's worth, I pull the inner fender shield on RTs and can reach all the way to the pump connector) I have found the relay supplied with the unit is less than reliable. I use a good Bosch relay. I use the PCM fuel pump trigger output to turn on the relay (basically disable the relay in the rear of the car). I am out of town but I think I do have some pics at the shop I can email to you on Monday.
DW