The Stovebolt Site Forums The Shop Area General Truck Talk Re: What did you get done on your 'Bolt today?

Finally tracked down the elusive vacuum leak on the replacement SBC 350 I just swapped in to my 49 GMC. It isn't the power booster fitting in the manifold like I thought, it's the manifold at the 6/8 runner.... When I'd spray the fitting and get increased idle I'd tighten and tighten, remove and add teflon tape etc., until I finally realized the overspray was hitting where the manifold bolts to cyl's 6/8. When I redirected the spray it finally revealed itself. The manifold is a Weiand Xterminator which is a single plane designed for high rpm. I believe I'm going to swap it for a Edelbrock Performer dual plane which makes better power at lower RPM, where I likes to cruise.
Dang previous owner put excessive amounts of RTV on it when he installed it....