Thread: need some clarification and more help..timing, carb, gears

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I havent posted in some time but I need help again. I bought a timing light a few weeks ago and have been playing with it ever since. Could someone tell me what I am doing wrong or exactly how to do this. There is a mark on the balancer and I am lining that mark up with that 16 on the chrome tab. Is this the right way to find 16* initial timing? When I set it this way the low end seems gone. Barely a chirp off the start. When I move the distributor counter clockwise(advance?) some numbers on the balancer show up on the balancer at the chrome tab. I used these numbers to find that I am getting 21* initial advance using this method. Am I doing something completely wrong. I notice there are two marks on the balancer, one on each end of the marks with a 1 inch space between it and the numbers. I am using the first mark before the numbers...is this right?

I leaned the carb out a bit by changing the jets and that stopped the fumes at idle and black smoke at WOT. I have a pretty bad stumble when flooring it off idle still and at part throttle under 1500rpm. Any ideas on what I can do.

The truck just doesnt seem to pull like I would like it too. Of course I could have the timing off and carb tuning way off. It used to burn through 1st and second but not anymore. Possibly going to 4.10 gears from the 3.42s. Thanks for the help in advance.