I did some mock up with the apache heads and a stock bore 6.1 I have here and it looks like it will be fine. I bought the heads next question I have is the comfort level using a solid stem 2.18 with beehive springs. I am planning to spin this thing 7300-7600. I am a little concerned. I was thinking of buying the hollow stem 2.18 manley sells and replace the solid stem valves. What's everyone's thoughts?
Sounds like $400 endeavor whether you change valves or springs. Except you may be able to sell the springs off your heads. I think it would be hard to sell the valves.
One point would be, not sure you can fit dual springs on Frankenstein's setup.
