i am replacing the old stock heads and intake on my 1991 rs with vortec cast heads and a vortec tbi manifold

but i am wondering what kind of cam i should replace the stock one with?

the vortec heads are good up to .475 lift

 

Is it a 305 or a 350?

Most people seem to have good fortune with the LT1 cam, in any event, and I think it might not have too much lift.

 

The lt1 cam and vortec heads is a good low budget build. Thats what I run but I havnt really gotten all the bugs worked out so I couldnt tell you the full potential. The cam works well with the stock springs, but thats about their limit. My vortecs are machined and have better springs for .500+ lift cams so I really want to go with a ZZ4 cam, maybe this summer I reckon. 2 guys on thirdgen.org are running that cam in their 305 tbis with pretty good success.

 

its a 1991 rs with a 305 tbi