Missed on this combo?

If you could've given him a flow chart, for them heads, it would have helped Bullet pic a better cam.
You are Right, when you say that" the cam is what decides reversion". But! two different exh parts(porting) will require two different cams to keep the reversion out.
By looking at how much cfm your heads flow at low lift, you know how easy, or hard, it will to get rid of Reversion!!!!!
I know you are stressed for time, but if you could get some flow ### from them heads it would help with the next cam.
Even your dyno guy said that he didn't like how the exhaust port were ported. Some flow ### will help build the RIGHT cam for those heads.
With the dyno sheet, i'm sure the cam grinder can make some much better assumption. flow numbers would help also.....................