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Reply to "Seeking advice regarding component selection for an 8 stack E.F.I. induction"

A few thoughts- D Quella used to sell both a tall and a short  8-stack EFI for the 351-C using separate left/rt intakes & a valley cover.  That led to complications in at least one engine with alloy heads: engine fully warmed up, the intakes expanded away from each other and 'pulled' on the throttle connector link, which changed the idle speed. Tricky to find, too as it was temp dependent. I expect the problem to be worse with all-alloy engines. Call Dennis- he doesn't do email & Becky retired.

Coupling vacuum lines from all 8 stacks into a plenum sometimes equals zero vac. I had better luck using a single plain rubber vac hose about 12" long, rather than all-steel, braided steel or other shiny overkill joined together. The rubber seemed to introduce a 'delay' that allowed vacuum sourced from one TBI time to actually move a vacuum advance. Worked for years.

Finally, whatever 8-stack assembly you buy including Webers, do yourself a favor and purchase a fiberglas rear decklid to trim for rear stack clearance & put your stock lid on a shelf for the next owner who will have different ideas. A  perfect steel decklid is almost irreplaceable now, and a few years ago, you couldn't give away a cut lid for scrap. The glas lids are 50% lighter and cheaper, too.

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