bellhousing

[junkyard jim]

Not a motor to trans adapter, but an actual bellhousing where you cut/grind off the original (IE: 700R4 or 45RFE to put an AMC 360 in a Grand Cherokee. <G>) and bolt up an AMC motor.
They make them for racing, but not AMC motors ("not enough call for them", as if they even noted how many calls they got!)

[junkyard jim]

Here's what I mean: http://www.racewithjw.com/JW_catalog.pdf
They make them for TH350 and TH400 to AMC (too much internal drag and no overdrive), but not 727 (which would also work with an A518 O/D and maybe 45RFE)