I just had a Rochester QJet carb installed on my '62 Corvair Turbo Spyder. there's only a little more than an inch for an air cleaner. I thought an offset air cleaner from a carbureted 3.8 might fit.
See the 'Vair here... BTW, I also have a '66 Skylark GS 'Vert. Owned since July 1980. Dry stored, never used. Loaded w/ A/C, Power Seat, windows, AM/FM, Engine dress up, Bench seat, posi... Red original paint, black int.

http://www.youtube.com/watch?v=R-ZaI2-PeZ8

http://www.youtube.com/watch?v=Dcwc358ZTAk advance to minute 1:06