67 Cuda 5.7 Hemi Tranny Advice Needed

Hello All,

I'm looking for some advice and input on my tranny dilemma. I'm doing a full-on 1967 Barracuda 5.7 Hemi swap. I'm going with the RMS Alterktion front k-member suspension setup.

I already have my 5.7 Hemi donor engine. It came out of a 2004 Dodge Ram 1500 pickup. It came with a Mopar 5-45RFE 5-speed automatic with two overdrive gears, with final ratio being .67 I do want overdrive.

My chief concern is the tranny tunnel. I really don't wanna cut up the floor, and I know my 5-45RFE isn't gonna fit without serious cutting and fabbing up a new hump. My 67 originally came with an A727, which are excellent tranny's and would fit right in there, but no overdrive. I understand that Chrysler basically upgraded the 727 in the 90's to add overdrive and called it the A518.

I'm open to anything at this point. I've got a couple months before I'm gonna install the engine and tranny. What would you guys do? Any advice here would be greatly appreciated.