Hi all, Bart and I have already gone thru this problem. I did some research today and came to the conclusion that AMC did not make a driveshaft for a Gremlin with a 727 tranny. The biggest factory engine that was put in was a 304. Every TSM that I looked at (71-76) said that the 304 had optional Automatic tranny, but it was usually a 998. A 727 was NOT an option. I will check the 77-78 years too, but I'm sure they will not yield new information concerning this. >From my knowledge, AMC only put 727's on the 360-401s. Therefore, if you plan to use a 727, you MUST shorten a driveshaft from something else (that used an AMC20 rear and a 727). If someone has conflicting informatin, please don't hesitate to let us know! Thanks.