Good topic.
I've got the porting pretty much done on mine as part of my FBI package. So, the topic of a sleeve/off-set with some of Pete's cams...is serious temptation!
However, giving up the Nikasil gives me pause, and I wonder if one is going to do that, then maybe going "whole hog" (AES/closed deck/ stoker) is the better route (for me). And too, part of the reason for pause is Pete's 5.7 often rubs shoulders with motors having over two quarts more displacement and over $10 large more invested: get what is still on the table with the 5.7...I guess is my point.
(Then again, Pete probably has $10 large spent on CAM BOLTS by now too! 
)