Did the picture links above of my Rupp work for you?
The H35 intake may bolt up to a Briggs but the carb will be tilted. The engine plate sits at a 20 degree angle, the carb may not like it when you go down a hill. Going up hill is fine however
You can Try to find a slanted H35 intake, but they are scarce and can be expensive if you find one.
Keep us posted on what you do and how it works.
Danford1
Here is a picture of the Rupp, I finally found a way to post it.
I was "told" the intake was bought from a place in Dearborn Heights Michigan called Studz Hardware, but can't be sure. It is specifically made for a Briggs on a Rupp with a slanted engine and a Mikuni carb. It fits well.
It was on the minibike with a 3hp Briggs when I bought it. Here is there phone number in case you want to call them. Ask for the minibike parts department. Phone: 313-563-1058