Colder plug for GT-40P's???
I have been using Autolite 764's for a while in the P's. I have added a 150 shot of N2O and would like to run a colder plug, but none of the parts houses around here can find a plug that is colder than the 764's.
Does anyone know the part # of any copper plug that is colder than the 764's???
Thanks a lot for any help!
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