I'm trying to figure out what wiring harness to buy I need to know how many circuit's to get.This is what I've got MSD 6BTM box,PerTronix conversion electronic,head light's,tail light's,turn signals,brake light,back up light,horn,electric fuel pump,wipers,dome light,gauges 5 and tach,stereo,alternator,cig lighter for acc,ing switch,sending unit on 16gal fuel cell,squirt can, I believe that's it. Any help would be appreciated