I actually did this. i took out the fpc and put in the 5.2 cpc and cams. I run a f1a-94 procharger on it and figured the cpc would be a little more reliable. I upgraded the valve springs and set the redline at 9000 rpm, it will happily turn that high but really does not make any power pass...
At this power level I don't think there can be a certainty lol. I do know that it's been at 900 for months now with daily beatings. Plus I plan to go a little higher and see if it will hit 1100. The motors are very strong, the only weak points are the oil pump gears and crank gear. Swap...