What is the port size of the 216? I’m looking at an offenhouser manifold on eBay and it shows the following specs. I just don’t know if I need the port adaptors or not.


Offy #1034 lightweight cast aluminum manifold

Fits 216-235-261 Chevy 6-cylinder

1936-52 engines w/ Manual Transmission

Carburetor Port Diameter: 1-1/2"

Intake Port Diameter: 1.40"

Carb Bolt Center-to-Center: 2-5/8"

Truck is a 1940 Chevy 1.5 ton 216.