At what point to go Dana 60 ??????

It’s actually a Reid bell. My trans builder cut off the old bell with a sawzall and grinder and did a damn good job of it. Almost looks machined. Lonnie has his setup on a mill machine with a fixture. It would cost a lot to do elsewhere having to build the fixture and all. That’s why my builder cuts them by hand.
Yea it looks machined. That’s why I asked. I’m debating over a 2004r or a gearvendors for an overdrive for my 67 Cuda. Don’t want to cut up the chassis or do a coil over conversion.