Thread: I built a 350.......

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The module may be breaking down under electrical pressure or there may be a loose wire somewhere in the distributor or one that is chafing against ground. Could be any of a dozen reasons. What I would do is to replace the distributor with a known good one, like take one off the motor of a good buddy or something and see if the motor acts the same way. That would eliminate the distributor as a cause. If the car runs better with the borrowed distributor, then get another one to replace the faulty one.

With the cam you have, you need at least 20 degrees of ignition timing at the crank, with 16 degrees in the weights, a total of 36 degrees centrifugal, all in by 2800 rpm's. If the motor is hard to crank with that much initial at the crank, interrupt the hot line to the coil and install a momentary push-off button that can be mounted on the dash or steering wheel. Press the button and turn the key to crank the motor. Once the crankshaft is spinning, release the button, allowing juice to the coil, and the motor will fire right off.

I really like an HEI for a street/strip motor. It's simple and bulletproof. Be careful buying a cheapo unit though. You get what you pay for. Here is one of the best in my opinion.
http://www.performancedistributors.com/gmssdui.htm
These guys will set it up for you custom-tailored to your application.

What make of carb?