my engine is a 1951 for sure, JEA engine code. I guess it could've been swapped between 1951 and 1955, if you're certain they were straight. '55 is when great-grandpa bought the truck, and grandpa says he's certain the engine has never had anything other than periodic maintenance done.

Also, another question...would a heat riser stuck in the closed position contribute to a cracked head? Mine is stuck, and I thought maybe that contributed to 4 cylinders being cracked, as I have no idea what else would've caused it.

Last, but not least, THANKS, Martin for your PM! I'll call you in the morning!


1951 Chevrolet 6400