Seems these Hyper spark systems are getting really good and can act like a vacuum advance under cruising. I'm pretty sure I saw some folks were getting 20-30% better highway economy. For those of us already rocking 5 speeds and 3.50 gears....that would be killer! I'll be jumping on the EFI bandwagon shortly. Got twins on the way, so gotta mind my bucks for a while until the dust settles. Just bought a new to us 3500 Van, lol.
