Any idea why the significant change in shape/size of the intake area between the 6107377 and the 2194002 manifolds? The exhaust manifolds are the same p/n. Did the FC trucks require something like the larger square intake for different vaporization perhaps? The only research I could find on the FC trucks was the wheel base of 125.5” and some other unknown WWII truck mods carried over into these earlier model years? Not real clear. I’d rather not use the 2194002 intake if it was not designed for this FC102 truck, even if it installs ok.
Thank you.
