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Old 03-28-2014, 10:35 PM   #20
Steeveedee
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Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,019
Re: 1 barrel rochester carb 1967 problem

The idle solenoid on your year truck was for pulling the idle up when the A/C was on. No A/C, no solenoid.

If you have points, they should be set 28 to 32 degrees dwell. Longer dwell (greater than 33 degrees) means retarded timing and lower saturation time on the coil, thus less power. I usually set points to 28 degrees dwell, since as the rubbing block wears, the dwell angle increases. This gives a measure of protection against rubbing block wear-in.

Long cranking times can be caused by high resistance in the ignition start circuit (yellow wire from starter to coil) or not having a proper ignition source when retrofitted with an HEI distributor. Most people put in an HEI distributor without consideration for cranking voltage, just hooking it to the "run" side of the ignition switch. The Kettering ignition (points) system vehicles get the voltage from different places than the HEI systems do. Unless you wire in a "start" source for power when retrofitting an HEI, it will be hard to start.

For the temperatures you are talking about, pumping the pedal may be required. However, pumping the pedal on an automatic choke vehicle can cause the choke to open if you push the pedal too far, and then it will be even harder to start.
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'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper

Simi Valley, CA
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