SM Head Modifications on a budget

Let’s see what opening it up for a 2.055 valve with a performance 70-60-45-30-15 and blending into an 89% throat does for us. Then like I said most guys are capable of using snap gauges or a go no go fixture to open the pinch up to .950 without touching the common wall because we can always gain more area there later. Airspeed numbers at the pinch and short turn after the valve job but before opening up the pinch would be interesting. Then we could see how much the pinch mod calmed the port.