Join Date: Sep 1999
Location: Vancouver, WA, near Portland, OR
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Re: V6 and SM420 and T18
If I'm not mistaken, the 3.4L V-6 is a 60 degree V, so not sure if there's an adaptor for the SM-420. You'd be better served with a 90 degree 3.8L V-6 from a '79-'87 RWD GM car. This is the decendent of the 225 V-6 that was optional for your '66 CJ. Should be able to make the 3.8L/SM-420/D-18 all work together with O.D., I'd think. Call Advance Adapters at 800-350-2223 and Novak Enterprises at 877-602-1500 for help with adapters to make it work.
'66 Jeepster Commando w/Buick 252/4.1L V-6
'70 Wagoneer w/Buick 350 V-8
'76 Wagoneer w/AMC 401 V-8 (sold)