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Because of the 305's small bore, you're pretty limited. Large valve heads (2.02/1.60) won't work on a 305 because the valves will hit the block itself. If it's an older 305, your best bet would be the old power pack 283 heads. They flow better than the older 305 heads. Now, if it's a vortec engine, you probably won't do much better than what it had stock. If you are really trying to go fast, the best thing you can do is junk the 305 and replace it with a 350 or a 327.
What else can I help you with?
Can Chevy 305 heads be used on a 327 Chevy engine?
Yes, and well.
How can you tell if your heads are bad on a CHEVY 305 engine?
take them to a machine shop
Where are the intake and exhaust valves located on a 305 Chevy engine?
In the cylinder heads.
How do you swap a 95 305 Chevy for a 350 Chevy engine?
the block & heads are the same you just have to pull the 305 out & put the 350 back in
Can Chevy 306 heads be used on a 327 Chevy engine?
Chevy didn't make a 306. A 302, 305, and 307, all of which will work just fine.
Will Chevy 305 heads fit on a Chevy 307?
Yes they will, but 305 heads have a smaller combustion chamber so it may raise your compression ratio.
Do 305 and 307 small block Chevy engine heads fit a 1964 283 cu in block?
Yes, they should fit ok. 305 heads should bump up the compression a little.
What headers do you use for an 84 Chevy 350 with Chevy 305 Vortex Heads?
The headers for a 350 and 305 are the same.
Is a Chevy 2.8 engine a 305?
Is a 2.8 liter engine a 305?
Will Chevy 350 heads fit on a tbi Chevy 305 and would it give the engine more power?
Yes they will fit , But you will notice no change what soever. ( no more power )
What champion spark plug fits 305 Chevy engine?
It depends on what heads and ignition system you're using. You'll have better luck with AC plugs in a Chevy.
What is the special feature of the Chevy 305 engine?
There is no information on the internet about what the special feature of the Chevy 305 engine is, in fact, the Chevy 305 and 350 are interchangeable, one is just an older model.
