Slight backfire and unable to preform under load

[burrizwo]

I see, the PRO ?
Great, it makes sense to me. Thank you very much

[greg g]

The vacuum gauge is attached to the intake manifold.  My car has vacuum windshield wiper so it's easy to attach the gauge there.  If you have electrical wipers, you might need to drill a hole in the intake thread it, then use a brass fitting to attach the gauge.  Then you'll need to get a suitable threaded plug to screw into the hole to seal it up after testing.  As for tweaking the distributor,  clockwise retards timing, anti clockwise advances.  Normally retarding lessens ping, knock, or pre ignition, or what ever the noise is call in your area.

 

Go to SECONDCHANCEGARAGE.COM their website has a section detailing how to perform the vacuum test, and an animated chart explaining what the various gauge readings indicate.

 

Just wondering, have you done the simple test to see if there are vacuum leaks at the carb base and intake to block sealing areas?

[Hickory]

Yes i agree with gregg good info on that site, i know you have used 3 different condensers, i have little faith in new condensers i always buy NOS at swap meets to keep on hand.