BBC spark plug help
 

We have a mid 70`s 454,290 casting heads,.600 lift solid cam,850 Holley HP, victor jr intake, 10-1 comp, bracket motor. Looking for some spark plug recommendations. Also has a crank trigger with a 7 al ignition. 7000 rpm limit with leaded race gas. Thanks for any input.

Re: BBC spark plug help
 

When I ran iron heads, I always used NGK R5673. The -8 heat range is a good place to start.

Re: BBC spark plug help
 

Thanks for the help. We will start there.

Re: BBC spark plug help
 

Autolite AR-133 or AR-134 the higher the number the hotter the plug.
Rich