sounds like the timing needs to be advanced a bit. You'll need a good timign light or vacuum guage (depending on method you use) to set it. I prefer using a light mself. You'll need to disconnect the vacuum line to set base timing. The timing marks are on the flywheel, and can be seen through a port on the bellhousing, just above the starter. It's basicly a matter of loosening the clamp on the dizzy, pointing the light at the timing port, squeeeze the trigger and turn the dizzy housing until the pointer and the ball in the flywheel line up. You may want to consider getting a timing light with an advance knob on it so that you can keep track of where you set it if you advance it beyond 0 degrees. Then tighten the clamp.
As to the manual issua, best one is the factory shop manual. The assembly manaula comes in handy, especially when getting into body and frame disassembly, but not real good for maintanace and repairs. Another sorce would be Keith Hardys Online Chevy Manual Project,
http://chevy.tocmp.com/ . especially since you can print the pages you need and take them to the project and not mess up your books. There's many of the Chevy and even some GMC manauals on there.
