Here's one that always get some opinions flowing.

Back in 96 I wanted an overdrive Torqueflite for my 440and of course there were none. Still aren't, in fact. There wereguys selling adapter kits but I don't like adapters so I cut off the bellhousing from a big block 727 then welded it to a small block A518.

This is the hydraulic (non-electronic) shift version of the 46RE.

Did it work? Yes - very well. I just took it out after 12+ years. No leaks or other problems of any sort. I run a 4.10 gear which turned into about a 3:1 ratio after the OD is engaged.

I also learned that a lot of the talk you hear about factory machining being poor is just wrong. Back then I indicated about 20 transmission cases and found they were all within .005" and most were around .002-3.

This particular case showed about .0015" runout.