Hi there friends,
So I'm building a couple of bikes right now for myself and a friend, and the dude at my LBS was a complete ****** to me the other day when I asked him this question, so I'm hoping someone here can help me.

I want to put coaster brake wheelsets on both of the bikes I'm building. One is an old Schwinn Road bike, and the other is an early 90's Schwinn hard tail mt bike. I want to use 700c wheels..... Can I do this, concidering that I do not need the brakes to line up, as I'll have coasters? I assume this will be TOTALLY fine on the old road bike, because it has 27" rims on it now..... the Mt bike I'm not so sure of, as it has 26" on there..... the only reason I can think of tht it won't work is due to the brakes not working, but as I said, I don't need them now.....

Thoughts??

(P.s., I am not trying to be a wanna be hipster with this coaster brake action.... I *F*ed my hand REALLY badly mountain biking last season, and I can't pull a brake lever anymore.....)