Contact Ken Hensley at Hensley Performance in Knoxville TN...865.947.0426. He was racing 727's in the early 60's before auto's on the track were cool...His machine shop is all MOPAR...engines, tranny, rear ends, drive shafts, and an expert in cam/intake/head selection for every application. He has over 40 years of drag racing, MOPAR family dealership, and hot rodding machine shop experience...his son is Matt Hensley IHRA SS/HA record holder in his 1968 Hemi Cuda...there's not many guys left in this world that have true life experience with all of the evolutions of every MOPAR part since 1962 or so. He's built my 340, 904 ($1,050) that he prefers for weight reduction over the 727, and will be starting on my rear end and driveshaft for my J body soon...he's a very patient man that will talk with you at length to get your build to be exactly what you want it to be, and he is very anal about clearances and balance no matter what he is building. I encourage anyone needing machine work, head work, engine/tranny rebuilds, or just information about the best combination to give him a call...I am very lucky to have him 8 miles from my house and get no compensation from promoting his shop...just sharing.