Ok im a lil stumped with this one. I have an 81 silverado 3/4 ton 350 w/4 barrel rochester and manual tranny. the truck was off the road for about an month and a half and sat outside. since i have put it back on the road the truck dies in the morning. it will fire up fine and idle but as soon as i get about 2 or 3k from home it dies it if put my foot on the clutch at a light or to change gears. after it dies i can fire it back up no problem. it only does it early morning on the way to work, never late at night or on the way home. i dunno what to check, its got all new filters, new pcv cap + rotor are good. it stopped doin it for a couple weeks but now its back. any ideas or an idea where to look, i'm wondering carb but i dunno why it would only do it in the am? anyway if anyone can heelp it would be great.