Join Date: Feb 2001
Location: New Mexico
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Re: 77 CJ 7 cats or no cats?
Nenofury hope this helps, I own a '77 CJ-5:
(from page 4A-16, 1977 Jeep Technical Service Manual)
All V-8 CJ models, all altitude CJ models, all California Jeep models Cherokee, Wagoneer and truck models have a catalytic converter. Leaded fuel poisons the catalytic converter, although use of a few gallons of leaded fuel in an emergency does not seriously impair the converter.
All CJ models and all California Cherokee, Wagoneer and truck models are fitted with a fuel filler neck restrictor (refer to Fuel-Carburetion section) which admits only the smaller nozzles used for unleaded fuel.
Most models use a single pellet-filled canister-type converter, California V-8 models use a monolythic-type converter.
(end of quote)
I have a catalytic converter, stock, on my CJ because it is a high altitude model. I would also suspect that if your 7 has a fuel filler neck restrictor, and has a factory V-8, that it should have a converter. E-mail me if I can be of help. Jeff
Why drive a luxo-box SUV when you can lay in the dirt busting your knuckles under old iron? '77 CJ-5, '64 S2A Land Rover