Easiest way to figure it out:

Remove valve cover on odd cyl bank, (think its the driver's side). Rotate motor until valves on #1 cyl are closed. Line timing mark up with 10 degrees BTDC. Remove distributor cap and note where rotor is. Rotate distributor body until rotor is just about to line up with a cap terminal (doesn't matter which one, cuz the dist was removed). This is your new #1 plug. Should be first cyl on driver's side. Since a chevy's distributor turns clockwise, go CW from there
1-8-4-3-6-5-7-2. Then when she fires, she'll run decent because timing will already be somewhere around 10 degrees BTDC.

good luck

chip

Whoah, hold on. New camshaft? Rebuild? Did you do the pre-lube before you installed the distributor? Its a must.

Preaching the Hot Rod Gospel according to the 4-stroke apostles:

Suck, Squish, Fire and Fumes