Turbo head build

The head only flows around 140 cfm +/- 10.
I remember "porting" my slant head as teenager and later finding it flowed a whopping 175 cfm once I got a bench.
My point is.. the first 10 or 15 c f m is kind of easy, which one could say that about any head.. Maybe. There's a lot of precise work to get a slant 6 intake port over the 185-190-cfm hurdle...and there is water everywhere. So take it easy and just run it. It's just a stock cam and these don't RPM much without a lot of work... in comparison to a V8. PS I hope you're not spending 700 just for valves.