I have seen many ways to swap an FMX to a Y Block, many involve swaping the front pump from a FordoMatic and some internals to change the input to 17 spline. Seems a little involved

I have a 70's FMX and would like to know if anyone has tryed this.

Use the FordoMatic bell housing (drill the 2 new holes)
Use a 58 292 flex Plate (11 1/2" convertor bolt circle)
Use the original FMX convertor ( 11 1/2 BC  1.375 pilot)
Have a bushing made for the Y Block crank 1.572 to 1.375 to support the convertor

Sounds to simple, have not checked the convertor to front pump engagement while on a Y flexplate but the Y plate is very similar to the small block ford that the FMX was prevously mated to, only unknown id the depth of the Y bell housing VS the small block ford.

Has anyone ever tryed this? If so did it work. Would save me the trouble of pulling the 3 speed out and doing the trial fit.

Thanks in advance                       Kevin

Kevin. You are correct. I SHOULD have machined it to the Y block diameter. I had a new pilot installed when they modified the converter. We had to shorten the pilot as well.

Frank/Rebop

Bristol, In ( by Elkhart)