I like the older Briggs engines, so far I have restored a Model A with kickstart and remote fuel supply (no holes drilled for tank brackets) and a Model B which has been fitted with a flywheel and runs lovely and smooth. I also had a Model I but sold that last year, I also sold my A because a chap kept pestering me for it until I gave in, however he only kept it a week or two and sold it on for a profit! Wish that I had kept it myself now, you live and learn! I know of a ZZ with a generator, not sure about taking that on yet though.
You are making a good job of your one, it will look great when finished.
Pete.