Quote Originally Posted by pat mccarthy View Post
i have have good luck at .035 to .045 with the msd stuff no need to go that big less you want to check if your plug wires for leaksno need to buy any plugs better then a copper core .. ngk.s or denso.s accel.s all have the U goove . i use only auto lites. any thing other then AC.s you can play with this stuff but. i never seen any thing .i a low dollar plug guy
Pat - why would you go less then at least the original, and in this case, .054? I was under the impression that these gaps were optimized for the electronic ignition systems, fuel charge burn efficiency/gas mileage (tho I really don't care so much about that-it's a fun car, not a daily driver). Granted, I used to use .035 on my past push rod Fords with the Dura Spark ignition even with an MSD box and coil in a couple cases. Heck, if that's a better gap, and I know why, I'll 'fix' the plugs now

As far as those plugs, from Rock Auto at about $2.50 each including postage is cheaper then I can buy a copper core Auto-Lite locally - even Wally World. (Heck, a plug is cheaper now then a quart of their house brand oil)