Lots of running up and down stairs but my wife said I can afford to loose some weight. LOL. They measure 1/2 and the number on the intake is 2465726 if that can be crossed reference with something. Also I could not find a number on the heads.
Ok, that's the original 65 273 4 bbl intake with the early bolt diameter and angle...
I'm not sure if Offenhauser made an intake for those, but I know Edelbrock has a great intake for those heads if you can find one... They are obsolete and in high demand because they work so good...
The Edelbrock D4B is the correct intake for that application...
Not the Edelbrock LD4B which is for the later style head bolt angle and diameter...
Or you can get the 'regular' intake and test fit it... If you need to, you can open up the holes in the intake to fit the angle difference...
Or swap some 66 and later 273/318 heads on it and any intake will fit...
