Yo, Did you check out my Jacobs install in the "truck tech" section of this site? I installed a Jacobs system, the "ultra team" Off-raod. ($578!) Was it worth that much coin? I think not. I haven't seen any MPG gains at all. I've adjusted my driving, maintaining speeds under 60mph while commuting 45 miles each way (over HWY17 to Santa Clara)
Stopped "hammering" the throttle at stops, using my cruise control on the flats ETC..
I log my gas useage, (date, amount, cost mileage) at every fillup, and have done so since I bought the truck in 96' (it's paid for now! I've been watching the MPG after my install, and havent seen an increase. Granted, my motor does appear to start quicker (never had a problem there thought)it definetally has more "PooP when I wake the 360 up. If you use or have a CB or HAM radio installed in the truck, you'll get RFI! If the radios are mounted near the dash, you'll get that annoying "whine" from the distrubitor. I need to relocate both of my HAM radios now, to below my seats because of the noise from the huge spark the system puts out. It DOESN'T bother my stereo! Otherwise I'd have shot system many moons ago!
If I had to do it al over again,....Wait a minute, wanna buy a Jacobs ignition system?
Later...
Troy