727 and 904 will both require a kick down cable. Actually pretty much any dodge rear wheel drive trans will require one. The two transmissions are very similar in design and operation. Just different torque handling capabilities.
Thanks, I appreciate the knowledge. I was going to do the cable this weekend but got wrapped up tearing the top half off my daughter's mustang to replace a head gasket, hopefully sometime this week in the evenings I'll be able to get under there and at the least get the cable attached at the transmission since that's the hardest part for sure.