How much HP would a Chevy 267ci v8 sbc make with a 4bbl carb and headers with dual flowmasters?

How much HP would a Chevy 267ci v8 sbc make with a 4bbl carb and headers with dual flowmasters?





They were made from 79-82.





Stock with a 2bbl it says 120 hp and 215 ft/lbs torque... So how much hp and torque would it make with a 4bbl estimated?|||Headers and exhaust will gain you 20-25 HP.





Intake and carb 15 HP





So put you around 155 HP or so|||very poor breathing smog era engine..low compression bad cam..poor heads





with a proper [modern] intake manafold...600cfm carb you gain 10 hp,,,duel mufflers another 10 hp...if you use headers gain another 10hp...another idea is get a new distributer for more total and faster timing..|||about 5-10 more. a 4 barrel does not give more HP as sometimes as this application probably less if you did not put headers with mufflers.