If you visit a LOT of conversion sites, talk to a lot of owners, and I did, you will get a range of responses from "yeah, works great took a few weekends" to project for a few years then tried to sell. Physically putting another motor in and getting the mechanical stuff of the drive line sorted is bonehead easy, and pretty much nobody screws that up. No issues with the electrical side or gauges is dream to owners of stock 928's, so I have a hard time thinking mixing in Chevy parts will make it work better.
If you make much power, an automatic transmission is the only reliable option.
If you make much power, reliable operation, becomes a relative term.
OTOH, thinking it over a bit, yeah jump in Mason a Chevy conversion is a great choice for you.
