Ok hemi guys, I’ve looking for the best spark plug option to run in my 10/1 compression ratio 241 iron head hemi, I’m seeing it’s the short plug, but which one do you guys recommend ?
Rock Auto says a stock engine uses an Autolite 86 or an AC Delco R45S. I'd start there. IIRC, they are pretty common plugs, so there will also be equivalent plugs from other manufacturers.