Aluminum Head Identification
The stands are different.
Wish I had pictures of my W-5's. I may have the adapter plates out there.
Evidently, I made my ports a D shape. I know if I did them again, I'd use a 1.500 exhaust valve. And make the exhaust port way smaller.
BTW, I used 2.100 intakes with .310 stems and it was damn tight. No way would a 2.125 valve go in there. If they are W-5's someone moved the guides.