I don't see a problem with it and have considered doing that very build for Pinz owners when I get through with the M35 stuff.
I would probably use a mag unit which is much smaller as you really don't need all of that juice for accessories. It would also be a lot less drag too....
Looks like those guys have their stuff together. . . nice to see modders putting out quality work for MV's.
Have you looked at the Solar Converters Autotransformer? http://www.solarconverters.com/product_frame.html This will allow you to keep a 12 volt battery charged without having a separate 12 Alt. It also will allow you to jump start your truck from a 12 volt source. This mod has been done by many in the Pinz crowd. Chuck in Jax has one on his truck. He is a great guy and would be able to let you hear his point of view. After looking at many different ideas I have decided that this is what will be going on my truck. The problem with the set up you are looking at is the hole that must be cut in the engine cover.
Do you get down towards Orlando any? We have a group of Pinz owners that get together about every other month and go out to the woods. We will be going this Sat to Richloam (near Tampa) if you (or anyone else) would like to tag along. There are about 6-710s and 2-712s here locally. We always have room for more.
My 710 has a solarconverter's system in it and I really like it. I have a separate 12 volt battery in the tool box and use that for all my twelve volt accesories. An added benefit of the third battery is that if the 24 volt sytem dies you can jump start the truck with the twelve volt battery.
Mike mounted the system under the dog box and I didn't have to cut anything , I just pulled the wires in trough some ot the holes already in the cab. Hooked up a fuse box and had twelve volt in the cab. This system is seperate from the main switch so if you dissconnect your batteries your 12 volt system is not affected and your radioes won't loose memory
Got it from a guy in SC who's wife wouldn't let him get a boat until he got rid of one of his other toys. Drove it home from Charleston Saturday.
As soon as I get the insurance, tag, and title squared away I'll be on the road again.
I'm not giving up on the Worm, but I can't haul much in my other vehicle and it will be a long time till I get the Worm back into shape.
(Sounds like an excuse to me too, but logic is a funny thing when MV's are involved)