Help with Timing, Vacuum and Backfire - 289c.i.

[rwhite65]

Agazzo-
the way I finally found my vacuum leak, was by taking carb. cleaner and spraying it heavily along the intake to head seal on both sides. When I got to my leak, made my car's idle smoothed right out for a short period of time. When the idle got rough again, another shot where the leak was smoothed the idle out again.

This may be overly cautious, but did u use a torque wrench to install the intake?
Ryan