I just don't understand why you would need to lock it out on a street/strip car  I mean will it gain any performance? I set my base at 23 and total at 34 all in by 1800 RPM and it runs perfect with my combo. Gus  Pretty much the same here. So how much time do you think your engine spends under 1800 rpm on the street? Other than idling. I don't see the need for the advance.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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