Patrick,

The S-10 Chevy's seem to be pretty popular for that sort of thing. I think the key thing is they are narrow enough. Most modern trucks are quite a bit wider than the 30s and 40s trucks.

One thing to do is get your tape measure out and figure out your length, width, track and wheelbase then start measuring trucks that you see to find some likely candidates.

I am not aware of a specific site with the data, but you could try going to www.google.com and searching for Truck specifications or truck wheelbase. Just keep searching till you find what you need. Be creative in your searches.

good luck

Pat