spark plugs for magnum 360 carbed

[Bratpack]

I have a 360/390 crate magnum 360 and am wondering if the spark plugs will be same as la engine. Motor is carburated.

 

[fishy68]

Magnum heads and LA heads use the same threads and thread reach but the hex is a different size and shell is different size. The older LA plugs are 13/16 and Magnums are 5/8. I use the smaller 5/8 Magnum plugs in my X heads because they clear the headers better and they seal and work fine but I can't say if the larger plugs will work in the newer magnum heads. The only other thing you have to match up is the heat range.

 

[dgc333]

I run Autolite 5224 plugs in my magnum headed 360. These are the stock heat range for a magnum 360 in a truck.