What I can't find (in addition to everything else!) is which OBS L6 engines have similar port locations and 1 bbl. carburetor flange patterns (SAE #2 or 3) to the 235 & GMC, but obviously:
1. different intake port center distance
2. different? port ID
3. different port runner flange pattern
The Ply-Do 23" and Spitfire 25" SV look very similar to those (3 intake ports), but too small.
The Pontiac 239 and Ford 223/262 have 4 intake ports.
The Ford 226 SV has 6 ports.
Any other engines worth looking at?
