I know from personal experience on my 6 speed car when it had the GTX/DE combo if you have it at 6500 rpm in 4th gear and shift to 3rd instead of 5th it will throw a rocker :)
Nice build, but did you really connect the crankcase ventilation to the charge pipe?
http://i.imgur.com/hM0krAA.jpg
That my friend is a big mistake. You are putting the crankcase under some serio...
All I can say is you might want to figure out why you melted or damaged a CP piston before continuing on with the project. Because it doesnt take strong detonation on a VE to crack ring lands. CP...