Quote:
Originally Posted by enaberif
Not everyone has them just guys who usually have a high performance truck and need that bit of extra.
Stock HEI is perfectly fine for most trucks.
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Like enabenif said, stock HEI works just great. You'll notice changes as mentioned above, but the biggest won't be anything noticabled except for the fact the the box controls the spark at very high RPMs which most stock engines don't see. MSD's website has quite a bit of info in the product pdfs.
My '87 with the 454 has the MSD Digital 6 with the HVC Coil and the pro billet distributor. My mildly built 350 in my Jimmy has an HEI ignition system onboard and runs just peachy.
Kenny