Autolite 23 plugs need colder plugs

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Autolite 23 plugs need colder plugs #1189991 03/02/12 10:51 PM 03/02/12 10:51 PM
Joined: May 2011 Posts: 340 Alaska 7 73rrak OP enthusiast
73rrak OP enthusiast 7 Joined: May 2011 Posts: 340 Alaska	I have Autolite 23 plugs in my 440. The was a 78 motor home motor it now has 9:7-1 compression, Holley 800, rpm intake,headers, 727 2,000 stall, Whiplash cam, Stock dist with vac advance, MSD 6AL and the motor home 452 peanut plug heads. I need a 1 or 2 step colder plug that will fit these heads. I have a part throttle ping that is very similar to one that I had in my 512 and colder plugs solved that problem. I'm not worried about staying with Autolite and would prefer Champions if I could find the correct plugs for these heads in a colder range. Does anybody have a crossover or any ideas ?

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