Impossible to guess without more information about the internal components.
gettin to much gas to the carb
350 chevy with aluminum heads and intake carb and headers weigh
Pan to carb. 350, to 400 lbs.
NO.
Need to know the year of engine and size of engine that you are asking about. But first you need to know this. A 5.7L is a 350 engine. and a 5.0L is a 305 engine.
Rochester Quadrajet.
With a 4-barrel carb. 155hp @ 4000 rpm
depends on the size of the headers and the size of the carb. low end.... 650 carb, small tube headers, you can expect about 275 horsepower
With a 2- barrel carb.- 165 hp @ 4000 rpm With a 4-barrel carb- 255 hp @ 5600 rpm
275
An SBC from carb to pan usually weighs somewhere between 500-600 lbs.
it is possible to get up to 1500 hp from a 350, but you have to either supercharge or twin turbo it, and you have to change the heads, cam, exhaust, carb, everything.