BowtieJC
I'm Awesome
has anyone installed a MSD 6A ignition box in a 1996 vortec 7.4L, C3500 truck. if so did it make a performance difference. I've heard that it will help . just looking for a little more power in my dually.
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X2 - unless you're gonna try turning >6K RPM (which your 7.4 probably wouldn't hold together), a waste of money. As @df2x4 said, get it breathing better and then tune it.Complete waste of money on anything close to a stock truck.