AB6DO

2007 5.3/4L60e into 1948 Chevy pickup. Not using the vacuum booster. What is the best way to plug the up the hole on the rear of the intake manifold where the original vacuum hose plugged in? I do not have the original hose with the plug in connector.

G-Body

iTrader: (4)

The hydroboost trucks have a block off plug that fits right in and blocks that hole off. The bad news is I cannot seem to find the part number for it.

ryanleiker

iTrader: (2)

that is a Push-to-connect fitting. Hydraulic companies deal in these styles as well as some interior plumbing systems.

Here is a Parker brand plug you can use that will slide right in.
639PLP-8

Or you can snag one from a salvage truck... anything with a hydroboost brake system. 2500 silverados had them.