Factory 305s came with anywhere from a low of about 130 hp, to a high water mark of 230 hp for the hot Camaro LB9 injected engines in 1990. Most 305s made right around 140-150 hp as the factory net rating
170hp
200
Chevy Caprice power rating for that year was 170hp.
For a 305 with a 4brl carb. it would be about 145 hp. For a 305 tbi it produces 215hp from factory. No, a 305 TBI is rated at 185 HP stock.
235 horse is stock on 98 305
you are looking about 150 to 165 not much more than that.
Advertised horse power is 160 HP @ 4400 RPMS. STOCK.
190 hp stock out of the show room door.
Most 1987 models put out around 190 h.p.
It depends on the year if in the 70's or 80's anywhere between 145-180
Advertised horsepower is--- 155 HP @ 4400 RPMs Toqure is--252 FT.Lbs @ 2100 RPMs.
Freshly rebuilt with good carburetor at 5000 rpm, 200 horsepower maybe a little more