Sounds like an interesting build, I wish you luck with it. A lot of guys want race everything and are disappointed when their street car doesn't run well at low RPM and in traffic. Seems like you thought things out with the intended use in mind. This firing order thing has me screwed up. The stock firing order is 18436572, cylinders five and seven are adjacent and fire back to back. If you swap the four and the seven you get 18736542, four and two are adjacent and fire back to back. If you swap the cylinder that fires fourth in line [three] and the cylinder that fires seventh in line [seven] you get 18476532 five and three are adjacent and fire back to back. What exactly is the firing order of your proposed cam? If it's 18476532 is the advantage the two adjacent back to back cylinders are the inner two and not the outer?
