Mon Sep 10 22:15:45 2007
From: Jim Blair 

I just checked online www.innerauto.com/Jeep_Parts/Jeep_Exhaust_Manifold/
and the Part number is 1AEEM00225 and fits '72 to '91 RH side ('72 doesn't
have the AIR stuff so it would need 9/16" tube plugs) $129

Found another for OEM replacement #J960702
http://www2.partstrain.com/basket.php?add_item_id=1083807
$34.44 ($48.34 shipped)

http://www.car-stuff.com/basket.php?add_item_id=903594
$53.92 shipped