Anyone know the valve guide locations and AS CAST port/chamber sizes?

Thanks

 

In my GmPP book all it says is "Rough machined seats and guides, ready for custom porting and machineing"
DR CNC'd have a 50CC chamber size and 313cc intake, 116cc exhaust.
Ct CNC'd are 45cc chamber and 302c intake and 109cc exhaust.
But you probablt know that.

 

here are the dimensions for the CT raw cast heads 1.3 by 1.95 and 1.33 by 1.53 rough port*