19 to 21 inches at an idle.
Anywhere from 18 to 21 inches. is normal.
There is no difference,,,
That engine should have 18 to 21 inches of vacuum at an IDLE. You can find a vacuum source on the intake manifold.
It should only be needed for the end rails.
yes
10-12 degrees
It must be connected to a full-time vacuum source such as the intake manifold.
The 350 cubic inch Chevrolet intake manifold bolts have a torque specification of Haiti pounds psi. The bolts should be torqued at 40 pound intervals.
17 TO 19 INCHES AT A IDLE. 18 to 21 inches at idle, and the above answer is close enoungh too.
Yes it will as long as the 350 engine is not newer then a 1986
check for vacuum leaks
Apply an Anti-Sieze Lubricant and torque to 25 ft-lbs.