I have a 1968 GMC Camper Special 34 ton pu. It has a v-6 305 can anyone tell me what the hp. is I can't find any info on the engine.?

165 HP @ 3800 RPM

Fairly common engine, really. I am surprised you can't find info on it. Motors/Chiltons manuals are okay, factory manuals are the best. I don't know of a 305 ci V-6. I have a 1970 with a 5.0 307 ci. And stock horsepower on that is 200.

Check here for further specifications:

http://www.6066gmcguy.org/EngineData.htm

Try the 6066 GMC Yahoo Group, the people there know a lot about the V6 engines.