What's the easiest way to tell the difference between 216/235/261 manifolds? Are the ports on a 235 manifold noticeably larger than a 216? Would be handy to know exact sizes when searching somewhere you don't have internet to look up casting numbers. (Pic shows 216 width in inches).
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216 manifold port sizes.jpg (292.93 KB, 215 downloads)

Last edited by Skooter; 01/09/2023 11:51 PM.
Matthew 6:33

1952 Chevy 1/2-ton 3100
Late '55 235/SM420/torque tube 3.55
Dalton Highway survivor (using original 216)
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