340 vs 360

realest. OOTB, I think so. You might want to check Hughes though.
Hum, brb w/link

There site;
http://hughesengines.com/

The crank @ 4.18; http://www.hughesengines.com/partDetail.asp?partID=12602&eTypeID=1

The kit with crank for a cid of 426; http://www.hughesengines.com/partDetail.asp?partID=12603&eTypeID=1