Just in case the pre-war names are confusing see this link:
Stinson Voyager - Wikipedia, the free encyclopedia
Stinson 105 is the original name, the variations in pre-war naming tend to be related to engine type, and many of them have been re-engined since manufacture.
Re Franklins - they like non-alcohol auto fuel, and do not like as much lead as 100LL contains.
Re interior room, as I posted previously, the 108 cabin is a bit small relative to the large size of the airframe, and is particularly tight in the rear seats. However its not typically a constraint, just a bit surprising when comparing outside versus inside. Pilot seating is fine for most people. I am BTW, particularly happy to be a naturalized "Yank", and also have a remarkably low BMI
