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I am fixing to install a Holley Sniper 2-barrel system on my 1990 GW. I will be using the stock 2-barrel manifold. Do folks recommend reusing the stock base insulator plate and insulator gasket? Or can I just toss those.
That's great news. When I took the freshly rebuilt carb off, I discovered that the mechanic who installed it had overtightened the nuts and cracked 3 of the four stud holes so the spacer is now trash. This was, of course, the same mechanic who thought the vacuum feed to the power valve was a source for manifold vacuum. So he connected the power valve directly to the vacuum advance on the distributor. No wonder the motor ran rich. Took me a while to figure that out since I never imagined quite that level of incompetence!
Anyway, now on to fuel injection. Thanks so much for your reply.