Any of you guys have experience with this? Out of curiousity, I called the 800 number from one of the big Jacobs ads in Four Wheeler. I talked to one of the sales guys for a while and he said the entire "system" for my 350 would run about $500. A little pricey, but he promised some pretty substantial performance gains. Is it worth the money? If not, what about the MSD "Off-Road" box? At least that one is about half the price of the Jacobs stuff. Just in case it matters: Freshly rebuilt 350, Vortec heads, mild cam, Edelbrock intake and carb, no emissions dual exhaust.