Parts ID: Early Olds? Pontiac?

[4-barrel Mike]

Old abandoned project (not mine).  Attempt was made to use one side on a Model A Ford block.

What's it fit?  Manufacturer?





Base(s) may have been trimmed.

Mike

[desotoman]

Mike,

Could be a Cad also. Look on the sides of the injectors, if they have not been machined there will be casting data if they are Hilborn's. There will aslo be a small number that has been stamped into the injector, usually between the center two ports, like 131 etc.

Tom G.

[MTABike]

Mike,
I play with old Cadillac motors in my "spare" time.  Cadillac manifolds typically have the mounting holes (manifold to head) in line right near the center of the ports.  Looks more like an early Oldsmobile intake to me based on those holes.  If it helps you eliminate Cadillac as a possibility, measure the inside distance between the two inside ports.  A Cadillac manifold should measure somewhere around 6 7/16"
Hope that helps,
Scott

[4-barrel Mike]

No stamped or cast numbers anywhere 

Outer ports ~10 3/4" center-to-center
Inner ports ~7 13/16" center-to-center
Distance between inner ports ~6 1/2"

MIke

[MTABike]

Mike,
I will measure a couple more manifolds tomorrow more accurately, but I get very similar port spacing numbers with a quick measurement of an Offenhauser Cadillac manifold.