It is kind of odd how they mix engines around anymore in terms.
I had always knew an overhead valve 6 as an I-6 (216, 235, 261 ect....) An L-6 was a flat head engine or one having the valves in the block (Ford 226, Nash 172, Chrysler engines 207, 217, 230, 236, 250, 256 and 264 6 cylinders and others such as Hudson, Studebaker ect....) Then of course you had the F head engines such as Willys' F-134, F-148, F-161 which had the exhaust valve in the block and the intake in the head.
Anymore an L-6 seems to be any inline 6 cylinder engine and an F6 is a flathead.... Times change I guess....:-)
John
