Free cam build...

If you’re looking for “fully ported” SM heads....... buying the CNC version will likely be the least expensive option, unless you find someone that does porting for a pretty inexpensive hourly rate.

At my shop, if you wanted anything more than pretty basic bowl work(260cfm range), the CNC version would be a better bang for the buck.
I think the cnc job is about $800??

If you went with the CNC version, I think I’d go with a 2.055 intake valve.