What is the correct spark plug size for the 42? I read 14mm. Thought it could not be right. 216 ***Thanks in advance.LN
1942 Chevrolet Truck BaseL6 - 3.5L 217ci 3548cc - 1BBL GAS...Autolite® Copper Core - Spark Plug OE Style Gap: .040 Heat Range: A1 Thread Size: 10mm Seat: Gasket Resistor Plug: No Tip Type: Standard Hex Size (In): 5/8 Inch Radius (In): 0.250 InchPart # : 3136 | Line: ATOACDelco - Spark PlugACDelco - Spark Plug Gap: .040Part # : M8 | Line: ACChampion® Copper Plus - Spark Plug OE Type Gap: .036 Hex Size (In): 5/8 Inch Seat: Gasket Thread Size: 10mm Tip Material: Copper Quantity Per Vehicle: 6Part # : 842 | Line: CHPand.. did you know.. that AC in AC delco stands for alberto champion... yep.. alberto started ac delco.. then GM got it and he left to start champion spark plug..