i'm putting a cam and heads on my 305 tpi to wake it up a little and was wondering if you could run the zz4 heads and cam with no problems. and if there are problems what are they .

 

If its a roller block, yes. The ZZ4 head is a good upgrade for the 305. There is a debate on if teh 1.94 valve is too big for the 305's bore, but I have never heard of any problems.

 

It should work fine. Those are vette heads! They will flow a little better than the cast L98 heads and have more compression. Good choice for a 305 I'd say. You could probably go with a steel shim gasket to get a little more compression without detenation since they are aluminum.
Good luck,
Charlie

 

Aluminum Heads + steel gasket= BAD:nono:

 

Felpro claims their 1094 embossed steel shim gasket is supposed to work with aluminum heads, do they not work?

http://www.sdpc2000.com/cart.asp?act...id=575&pid=712

 

Don't go with a steel shim. The factory ZZ4 and L98 engines came with a .051 gasket. GM sells a .028 composition head gasket (I forget the P/N) that should raise your compression by half a point over the factory, I believe.

 

Check your quinch height when you pull your heads, that is why I went with steel shim on my iron headed L98. The pistons are all .025 in the hole on it and I did some chamber work too so I needed the compression back up, so I had the heads milled .010" and used a .015 steel shim gasket. With the small bore of the 305 you will not have as much compression as a 350 would either, so you might want to have them milled to get it up.
Good luck,
Charlie