There are 2 Offenhauser dual-1 bbl. intakes.
The smaller one (#1034 for the 216 and oldest 235) is 2-11/16" between bolt centers.
The larger one (#1035 for the late 235 and 261) may be marked "PG", as in "for the Powerglide engine" is 2-15/16" between bolt centers.
Relocating the bolt pattern is annoying, easier to use the smaller manifold with 216-size carburetors.
