i have 1991 z28 stock 305 ,and was woundering where i should start at i was thinking some heads, intake, roller rockers,lifters, about all the gutts inside so if can help i would really be thankfull

 

start with general tune up. plugs, wires, coil, k&n etc. Then move onto exhaust. Headers and a cat back will really open things up. Then you can move on to the engine.

 

oh ya. the thread was mostly about heads. oooops. I stay with factory heads until you've done some decent modification to your engine. otherwise I doubt you'd see much gain. if any.

 

trick flow makes a set of heads specifically for smaller engines like the 305. i would go with those or get a set of LT1 heads converted for gen 1 small block use. the third option would be a set of vortec 350 heads milled to get the compression back in line.

 

Do you have headers and exhaust yet?

 

do a search or see my signature, this has been covered a million times.

 

Look at some World 305 heads, they have prove some good HP gain, also some vortec heads milled down to 58cc.

 

I agree with the above on the Trickflow heads. They are awesome for a 305 and not to shabby for a 350.

 

You want the best heads?????? Look here, if you not worried about spending about $1k on a set.... ALLPRO heads.