On the front header, from the top of the port flange to the lowest point is roughly 26". The rear header (cylinders 4,5,6) is roughly 25". I ran a straight edge from the lowest point forward, so I could measure straight down from the port flange. Hopefully this helps. BTW: This was done with the headers off of the engine. John
'68 C-10 - 250 with Edelbrock 600cfm 4 barrel, Offy intake, Hedman headers and true duals, HEI, MSD 6A box, relocated gas tank
Soon to have: T-5 tranny
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