New engine for project andSpark plug selection

[scott657]

Gang, I just picked up a rebuilt engine for my truck. It had been sitting.
The block # is 3970014(350) and the head #is 3998993( not great heads, could be 1.72 intake or 1.94 intake) the spark plug bores are 14mm "peanut plug. I have a performer manifold and I just rebuilt a 600 performer for it.
I will probably run a points distributor with a pertronix ignitor and coil. Whats a good spark plug to use as a starting point R44 etc. Brand does not matter,I usually use AC Champion or autolite Just need an approximate Plug ##
As always thank you

[scott657]

I think the plug will be a champion 3025, It is a 5/8 tapered plug, pre HEI and seems very universal to the SBC

[scott657]

How about a champion RV12YC