Here is a basic tutorial - https://www.youtube.com/watch?v=xscWLSpB5Go

What the TECH is describing is LEAN TIP-IN.

I would worry more about the IGN, than the CARB. If the TACH is jumping (depending on quality and hook-up), it sounds more like a GRD problem as mentioned. You could also be experiencing a bad DIST and/or ADVANCE.

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Called Holley today they suggested increasing size on the accelerator pump nozzle???? They seem to after explaining the issue that needs more gas when the throttle is pushed to floor? I am really getting way out side of knowledge base. Any input?

Holley carbs have an issue that is sometimes hard to detect.  On the passenger side of the carb, the vacuum secondary linkage hangs a little lower than the carb base. If you use a wide base gasket, this linkage will hang up causing an inconsistent idle. If it's bad enough, it can cause other issues. If you take the carb off you will see what's going on.  You may have to trim your gasket.  All the carb linkage should be free moving and the idle speed should be consistent.

Another thing about tachs.  I have a modern electric tach in my dash.  When I installed a Pertronix module in my distributor, the tach went crazy.  I Googled the problem and found that I needed to put a 10 Ohm resistor in line with the tach wire.  I did this and it works fine.  Check with Pertronix for more information.

Tach going crazy could be a grounding issue,  is their a ground strap between the engine and firewall, if not under load as the engine torques  over it could loose the ground. Also check the braided ground jumper inside the distrubtor, if missing or broken the points loose ground as the vac advance moves the point plate.

Up date. Got looking things over, put a vacuum gage on noticed low vacuum and needle bouncing. Took spray bottle to look for leaks. Found leak around base of carb. Tighten and drove again ran better. But wine it up steady does good. But in the process if put to floor kind of a bog and then seem to kind of float without power, tack go crazy.
I have a Holley street avenger, 570 cfm. It is used so don’t really no about jets. I read somewhere about possible have to place a smaller jet in secondary side. Any thoughts on what’s going on, I am way over my pay grade.

Did the test drive today.  I put new condenser, points, spark plugs, retimed, vacum runs off port on Holley carb.  Starts up perfect and idles 475 rpm.  In neutral can run engine up slowly and steady to 4000 rpm, if stab gas pedal shows no issuses.  Took it for a drive if you run up speed in each gear seem to be fine.  If you put pedal to floor starts to build rpm the tach will go cray ( flashed 6 - 7 k ) without engine going crazy.  So as long as you don't floor it seem to run good?  My next move it PerTronix ignition.

I just stayed with the regular Plugs. For Me the Electronic Conversion does away with variances in Timing and Maintenance for Points. I do keep the old Point Setup in the Trunk just in case of problem with Pertronix.

  

Standard copper core plugs will be fine, probably exactly what you currently use.  Refer to the instructions as some electronic ignitions specify a type of plug but I don't think that applies to a Petronix conversion.


Lawrenceville, GA

Great thanks again!!! What spark plugs would be used with igniter ll ?

91281 is Correct. If You are also going to buy a Coil be sure its Flamethrower 2. I have had a 91281 for Years. No Problems.