I don't think it's 4G52... I don't know what it is but it's a stellar 2.0 block. 86stellar says that you can bolt a DOHC to it, which is what he is doing to a 4G64. I know it fits because the block of the Sonata 1.8 (a derivative of 4G63) is almost identical to the Stellar's one. I saved the headgasket off the elantra just to be sure. The only problem I have is that the thermostat housing is in the "back" of the head when it's placed in a RWD configuration... however I am told that changing the housing to that of a SOHC elantra (or talon for that fact, any 4G) will ease clearance issues because it is smaller. I think I have JUST enough room for the current housing, but in case I do not, then... smashie smashie firewall!
In any case, I'm having a hard time finding NA cams...
I think I got a good one here
FFWD Connection - Race Injuns That Will Freeze Your Brain
any info?