Cam intake closing importance

At 105 mph, you should be running mid 12s. 3200 is not much stall for a 318 with a .528. As YR asked, did you degree the cam? If'n'itwereme, I would keep the cam, port the heads and add a 4500 converter. I'm assuming you have sticky tires. If so, I bet converter change, bowl blend and possibly ICL change would get you low 12s.