yepp lighten up...not everybody is perfect with typing out words....the diagram crackedback posted comes from the mopar performance modification manual and is correct, the large diameter flywheel you found is for a truck and will not work, the flywheel from your 318 is correct but needs the modifications outlined in crackedback's diagram, you should have a machine shop or someone qualified to do this properly, keep us posted on pricing so we know what to expect when we need one done also...
