305 & 350 Engine HP Ratings

I have a 91' Chevy 2500 with a 350. The motor is bad and was that way when I bought it. Does anybody know what kind of horsepower these engines came with from the factory. Also what was the horsepower rating on the 305?
Any information would help, thanks.

The 350 was rated roughly 20 HP more than a 305, which doesn't sound like much until you look at torque - the 350 is about 60-80 lb. ft. higher, which IS substantial.

Thanks, I wasn't sure how much difference there was between the two. I have a line on 5.3 engine, trans and all for under a grand with under 100k miles. I may go that route, just depends how soon I feel like having it running.

i looked it up somewhere once for the 350 in an old truck my family used to have and it said that in 1990, the 350 had 210 horsepower. i have heard that the 305 is a boat anchor when compared to a 350 and it doesnt even get much better mileage or nothing. i believe that the only difference between the two motors is that the 305 has a smaller bore diameter. probably different cams and whatnot as well