the yard engines are icons of corporate wastefulness: they NEVER turn them off,
Price of fuel to idle them vs getting them stuck on a track and not start, very cold to be in one when cold, wear and tear on a massive motor like that getting cold and then trying to start it may easily be offset by a few hundred gallons of fuel for the winter.
One question, what voltage/current is the EV1 controller rated at?
I'll read through the rest of this topic(and respond with some suggestions) when I get the time. I've been to yuor site many months ago and frequently stop by to see what is written, so I'm sure you know the effect extensive aero mods will have on your range and performance. Make use of them! They are key to 100+ miles range on cheap lead acid batteries.
I'm currently converting my Triumph GT6+ to electric, starting on the cheap(~$2,000, 65 mph top speed, 50 miles range), but will eventually upgrade to make it a high performance car(~$12,000, 140 mph top speed, 0-60 mph in 5.5 seconds, 100 miles range).
I'm looking for cheap parts to source, and have looked in a few places with moderate success.