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Zimmy,
This I actually can help you with.. All FE motors can run 32's all can run 42's. or even 43's (which I am running now) If I were running long endurance races, for I would say 32's If I were doing a good deal of highway driving I would say 42's I tend to drive from stop light to stop light seldom over no more than 30 min. between starting and stopping. Summer is coming and I am likely going to consider 42's depending on whether or not I get run-on as the outside temp rises. You might want to start with a 42 and see.
Dr. Christopher Jacobs, PH.D., E.E. generally reccomends one step colder than stock for modified street engines, two steps for heavlly modified (11.0:1 compression) and three steps for the race applications discussed earlier.
It is best to use a copper plug of conventional design for use with an MSD. Exotic plugs work well in OEM applications with a marginal output, but tend to restrict the potential of a high performance CD ignition, and even reduce top end power.
I found with 10.5:1 compression .040-.042" gap worked best (for me). Standard gap out of the box is .035. MSD guidelines say .035-.055 depending on compression.. 11.5:1+ being .035 and 9.0:1 being close to max at .050-.055
Good Luck,
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michael
A man that is young in years, may be old in hours, if he have lost no time. But that happeneth rarely. Generally, youth is like the first cogitations, not so wise as the second. For there is a youth in thoughts, as well as in ages... Sir Francis Bacon (1561-1626)
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