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With AMC 258 6 cylinder, 304, 360 or 401 V8 engines;GM TH350, TH400, 700R4; California Residents: WARNING Fits AMC 6 cylinder and V8 engines to GM TH350, 400, and 700R4 transmissions. This adapter can also be used on 1991-00 YJ and TJs with 4.0 liter engines; *only if the flywheel sensor located on the back of the engine is relocated to the harmonic balancer at the front of the engine. We sell a kit that will accomplish this, part # 8794033. Flex plate part #716138B would then work for the 4.0 liter application.