FYI, pertronix recommended that I increase the gap to .45 with the high voltage coil on my 280 sel 4.5. I won't tell anyone that I am getting 12 mpg in city driving and 17 hwy.

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Litton
'90 420 SEL (sold)
'72 280 SEL 4.5
'98 ML320 (for sale)
'86 560SL
'05 Jeep Grand Cherokee Ltd (offroad in style)
'87 Chevy Blazer (AZ Pin Strips)