So
I am happy to report I found what I think is a great 460. Hopefull will get it within a week or two. It the very clean 85. 280 advertised on this site
My intention is to drive it, as is, this winter and in the early spring converte it to diesel. From what I read and discussed thus far seems that the 606a is best option.
I've also been strategizing this with the fellow whom will help me with this project. We feel it may be prudent to get donor car which may provide the trove of various brackets and bits required for the project.
As getting this engine is the first step In the process I was wondering if there is one model of model of merc with the 606 which is better than another for this project.
The other question is transmission - I happy to leave it as a automatic just to reduce scope of project but will a viable tranny likely be paired with this engine or is this a separate hunt.