I Might Just Know What I'm Talking About
Join Date: May 2002
Location: Selma,CA in the middle of the vineyards, Central California
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Re: MC 2100 insulator /adapter kit
Take a good look at the surfaces between the 'insulator' & and the adapter ...... they don't mate up (at least mine didn't) and you will have a huge vacuum leak!
Mine is a 1973 258 I-6, mid 1980 alum intake, summit adapter, Autolite 2100. Runs great without the 'insulator', connected the PVC line to manifold.