[crcain]

I think for all the little issues with a 4G64, it's a bit of a waste if your not going with a longer stroke crank. The stock 2.0l revs super high anyway so why would you want to rev the motor any higher? And the extra .1l of displacement I don't think will make much difference spool wise.

If you run a 4G64 you will be worrying about modifying your water pump, maybe your headers will touch the bonnet since the head sits 6mm taller. You'll be worried about headgaskets depending on your budget and bore size. My alternator bracket needed slight fabbing, etc. You'll be using rods and pistons which are less common maybe than the 4G63 stuff.

I'd only go 4G64 if you really want to go with a big crank stroke. Otherwise, there are so many proven combos for the 4G63.