| John Thanks. I balanced the carbs with my Carbtune after installing the Pertronix and all was ok actually. I am currently running 55 idle jets. Thats what I had in with the points and MSD prior to installing the Pertronix and really didn't have any backfiring to speak of with that combination. Would the Pertronix require additional fuel vs points? If so then I've got a set of 58 idle jets I can install that are in a set of 45E's I have on the shelf for a future 2.2 upgrade. The 45E holders are 7850.9 which is weaker than the 7850.7's that are in there now, so I'll keep the 7850.7 holders and install the 58's for the first try. However my plugs have historically been sooty with the 55's. What holder and jet did you end up using? ALso will changing the timing to 12^ from 10^ help with this or is that a seperate issue? Thanks again for your advice. Last edited on 07-07-2007 09:45 pm by John Finch
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