999 / 727 Torqueflite (1980-86) - This transmission can be identified by a case length of 16”, and a transfer case adapter housing length of 6-5/8”. These transmissions can be found behind a 258 6 cylinder or AMC V8 engine. These transmissions were coupled to both the Dana 300 and New Process transfer cases. We have developed an adapter plate that bolts to the front side of the transmission case, adapting it to a Chevy V6 or V8 engine. The kit also includes an internal adapter for the torque converter. This adapter ring indexes to the Jeep torque converter and then has a standard GM bolt pattern to couple to a factory GM flexplate, this ring also takes care of the spacing of the converter with the new engine and adapter housing.
This installation has become very popular since the transmission can remain in the original location, eliminating the need for driveshaft modifications. This transmission is very capable of handling the horsepower and torque of a Chevy engine. The stock column linkage can be retained, but it will require some fabrication. By installing a Chevy V8, you will lose the original column linkage pivot point. An alternative to this stock column linkage would be a cable-operated floor mounted shifter. The 1st gear ratio of the 727 is 2.45:1, 2nd 1.45:1, and 3rd is a 1:1 and the 1st gear ratio of the 999 is 2.74:1, 2nd 1.54:1, and 3rd is a 1:1.
716131-A Chevy block
716131-V Chevy Gen III Vortec V8 block