I dislike the plastic valve covers! If I didn't have a 4.0L head, I'd be tempted just to swap the plastic covered one on my Spirit for a tin cover one I have from an '80 Jeep! -------------------- Date: Thu, 21 Feb 2008 12:25:49 -0800 (PST) From: Greg Taylor <amundaza@xxxxxxxxx> I would recommend getting the later 1980's 258 cylinder head, intake and exhaust manifold. Those 258's had 9.2:1 compression. Then you could do the Chevy 1.94/1.50 valve conversion, using the undercut stems for more low/mid range air flow. Picks up an easy 30 HP in breathing on a stock 258 in my '83 spirit GT. FYI, on a stock bore engine, I had the exhausts cut down to 1.45" diameter. -- Frank Swygert _________________________________________________________________ Helping your favorite cause is as easy as instant messaging. You IM, we give. http://im.live.com/Messenger/IM/Home/?source=text_hotmail_join -------------- next part -------------- An HTML attachment was scrubbed... URL: http://splatter.wps.com/pipermail/amc-list/attachments/20080222/c56aaa8d/attachment.htm _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list