What plugs do you run with your 781's ? Autolites ? or AC Delcos?

Hey Bob,

With the lil 414 rat and a small dome/pump gas compression I can an Autolite AR13 which is an extended tip plug.

With the new shortblock and a larger dome & higher compression, I run the same heat range, but it's an AR 134 which is an NON-extended tip plug.

These plugs are gold iridite plated instead of the black oxide and the ground strap is cut back from the factory. A couple places locally sell them, but I saw them in Summit if you search for the Autolite brand. Also, my local places are cheaper than Summit, so do some checking around. I believe I pay around $2.75 each locally and Summit wants $4.75?