Rochester Quadrajet.
there is no carb on that truck
165 hp stock 2bbl carb A lot of the pickups had a 4 barrel, which added 20.
That 87 truck already has a carburetor on it.
adjust the chock if it has carb.
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.
A four barrel carb usually adds about 20 hp.
the 5th character in your VIN is the key to your answer. "M" = 200ci-V6 chevy, "A" = 231ci V6 Buick, "J" = 267ci V8 Chevy, "G" = 305ci Chevy with 2 bbl carb, "H" = 305ci Chevy with 4 bbl Carb, "L" = 350ci Chevy with 4 bbl carb
check the ait. on yhe left side of carb..it control's idle.
210 horse power with a 2 bbl carb
That would most likely come with a Rochester Quadrajet.
Stock carbs were usually 600-650 CFMs a 750 can be used but it has to be jetted down.
Either the timing is excessively retarded or you have a worn camshaft or related problem.