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Discussion Starter · #2 ·
I do not beleive that you need to do the nutter bypass to upgrade to the GM HEI.

The GE HEI is an increased spark upgrade the the Nutter bypass is a Ox and fuel mixture modification. If your Carter BBD w/ the stepper is working fine I would not mess with it. I have one and mine is working (for now). When I do have problems I am going to a new Carb or EFI.

I would try the upgrade and if it does not work then do the nutter bypass.

A conclusion is simply the place where you got tired of thinking.

1,929 Posts
If your stepper is working then there is no reason to unplug it. You also don't need to do the Nutter bypass. Just get a working HEI and new plug wires and you are set. I got an HEI at Aaron's auto parts on S. Congress for $45. The AMC drive gear from 4WD Hardware is about $20. All I need are the plug wires and a couple of hours for the install. Let me know if you need any help.


P.S.I have my stepper unplugged because it isn't working properly.

85 CJ7-4.2L,T-176,D300,2.5" lift,32"BFG MT,Durabak,York-Air,HEI?
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