Nos Single Nozzle Pill Chart
Dave
75hp: 41N / 26F (nitrous/fuel) plugs: NGK TR6 or Autolite 103
100hp: 51N / 31F plugs: same as above
125hp: 55N / 35F plugs: same
150hp: 63N / 38F plugs: same
I hope that helps.
...and that is why I am N.O.S.john.
Here is the link to the pdf.
http://www.holley.com/data/Products/.../199R10297.pdf
Ricky
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