First and foremost, "hats off to you for going your own way". The world of drag racing is dominated by Suzuki and Kawasaki for the most part, so just because your different does not mean you can't achieve a level of success with your project. With that said, your cylinder head approach is right on track for producing power on a naturally aspirated motor. Keep finding ways around the obstacles until you make it work. One word though... at the end of the day the cylinder head that flows the most air and retains the highest velocity will produce the power your are looking for. Your engineering efforts to convert heads may be more work than modifying your original head to achieve the same thing. Here comes the best part though.... in the end, you will be the expert to say so, one way or the other. Not everyone fully understands the satisfaction you get from a project like this, and it is certainly not represented on a single time slip. But for those that do, we are cheering you on. Keep challenging the status quo, and never, never, let anyone tell you what you can't do.
Good luck! Keep us informed.