I've got a N42 head on the L28 block Running 40 DCOE Webers. I currently have a 270.80-490 cam....Question is what is the compression with the stock "dish "pistons w/N42 head?

 

Its been a while since I've been on this list. Have you measured your head to see if it has been milled? I'll do a little research and see if I can find the stock head thickness, and I'll also research the CC of the combustion chamber. You can CC your head to determine weither the head has been altered.

This punk that lives down the street from me has a car very simular to the one you described. :-) :-) he,he,he....

 

I belive the compression is 8.37:1 stock

What turns? There all straight to my Z