305 heads work on a 350 engine
A 350 cubic inch engine that is bored 0.040 inches typically refers to a small block Chevrolet engine. The horsepower of such an engine can vary significantly based on factors like the specific components used (camshaft, heads, intake, and exhaust), tuning, and whether it's naturally aspirated or turbocharged. Generally, a well-built 350 engine can produce anywhere from 300 to 400 horsepower, but the exact figure would depend on the specifics of the build.
Around 375
Need to know the year.
YES, A 355 is just a 350 bored 0.030 over very little difference.
The difference in horsepower between stock heads and Vortec heads on a 350 Chevy can vary, but typically, upgrading to Vortec heads can yield an increase of around 30 to 50 horsepower. Vortec heads are designed for better airflow and combustion efficiency, which contributes to this gain. The actual increase can depend on the overall engine setup and tuning.
In the mid 300 ish Hp
Stock 350 horsepower. With all the mods you can achieve 1,250 horsepower. (But you run the risk of blowing heads.)
I had one with 10:1 compression that was making close to 350 hp with decent heads.
Why 400 heads? They are notoriously bad flowing heads without much modification the engine would be about 360 cubic inches, but the heads have nothing to do with the size of the engine.
No. 305's have small valves due to the 305's small bore. Large valve heads can't be used on the 305 because the valves will hit the cylinder block. 350 heads breathe MUCH better than 305 heads. Stick with the 350 heads.
carb, cam, intake, headers, heads, msd igntion, or a 350