Which raises a question for me (and something I've wanted to try myself) and that is why not take a look at the newer OHC/FI sixes (or 5 or 4) that GM used in the Trailblazer and smaller pickups? That would eliminate a lot of the problems you've already considered and you'd have something really different. I have a OHC Poncho engine that I've wanted to try out in something but it is old hat compared to the newer GM family of inline engines. Another plus is that they were made with 5 speed OD trannys and A/T so your choice. Either would necessitate a change to an open rear end but I'm guessing you already know that. Just food for thought. Good luck and Welcome Aboard.
The major stumbling block in using the Atlas series engine for a donor has been the front sump cast aluminum oil pan which has a hole thru it sideways, needs lots of oil, and interferes with many crossmembers. An Inliner has developed/cast a pan to open up the donor possibilities and if I was building a Stovebolt that needed big trailer hauling grunt I would closely look at that option. Here’s the difference side by side:
http://s176.photobucket.com/albums/w186/curt160/Marcs%20stuff/Here’s where they will be available:
http://www.emtechmotorsports.com/index.htmWelcome and great job researching your options. You’ll find your way.
