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duke36 · 10-30-2017, 05:04 PM

See Larry Brumfield post of 6-29-10 for info. on plugs.
YBlock, our 5.5 w/ W18's (new no. 518) runs a nice tan color and the price is right per plug. We ran TT10's for awhile and the car likes the 518's with a Marvel carb. Note this is w/ FS zipper ignition which we're going to change back to modern points due to advance issues on hills and see how that works. Also, I use small amounts of lead substitute and ethanol stabilizer in gas (but not sure how much effect that has.).

10-30-2017, 05:04 PM	#13
duke36 Senior Member Join Date: Jun 2015 Posts: 1,414	Re: Which plug do you run? See Larry Brumfield post of 6-29-10 for info. on plugs. YBlock, our 5.5 w/ W18's (new no. 518) runs a nice tan color and the price is right per plug. We ran TT10's for awhile and the car likes the 518's with a Marvel carb. Note this is w/ FS zipper ignition which we're going to change back to modern points due to advance issues on hills and see how that works. Also, I use small amounts of lead substitute and ethanol stabilizer in gas (but not sure how much effect that has.).