th350
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Joined: Jul 1999
Posts: 17,265
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
It's usually ported directly to manifold vacuum directly on the intake manifold. Find a port on the carb that has manifold vacuum at idle.
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