The Stovebolt Site Forums The Shop Area Engine Shop GMC 228 head and 270 head

The GMC P/N for a replacement head is 2071456 for 228,236,248,270 prior to 1953. As a rule of thumb, any head that was used on an engine with the domed pistons will interchange. Casting numbers can be 2136477,6107412, 2194819. A GMC from 53 on will use a flat piston and a different head.