Its back toward the intake side of the head. Check throttle body. 3 bolts is renix. 4 is HO. Should be 7120. Also HO ecu is beside left inner fender. Renix under dash. ------Original Message------ From: Richard Estermyer Sender: amc-list-bounces@xxxxxxxxxxxx To: amc mail ReplyTo: AMC, Rambler, Nash, Jeep and family Subject: [AMC-list] 4.0 to 4.2 question Sent: Mar 18, 2010 7:04 PM Hey Gang, I had done reading on the 4.0 head swap and suggesting the use of the #7120 head casting of the 4.0 head circa 1990. Does anyone know where the casting number would be located on the head? I'm looking at a 1991 and want to make sure I am on track. THANKS ALL! Blessings, Richard Richard Estermyer _________________________________________________________________ Hotmail is redefining busy with tools for the New Busy. Get more from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID27925::T:WLMTAGL:ON:WL:en-US:WM_HMP:032010_2 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://list.amc-list.com/pipermail/amc-list-amc-list.com/attachments/20100318/fb437bd4/attachment.htm> _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com Sent from my BlackBerry® wireless device from U.S. Cellular _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com