minty
Active Member
just installing 360 magnum into A body platform,300 hp base crate motor spec,can anyone recommend a decent allround plug.Thankyou
I like Champion plugs, I'd order them for a 70 340.
The 13/16 hex of the old LA head plug won't fit a magnum head. The thread and reach are the same but there is not enough room to fit the plug and socket down into the head recess. The magnum head plug has a 5/8" hex and is actually a great choice for LA motors with headers, the smaller 5/8" hex socket will fit between the tube and the head on cylinders 5 and 7.
If you want to go with Champions the numbers are RC12YC for a regular plug and RC12PYP for the double platinum plug. 12 is the heat range.
Jack
Autolite 3924's...........