Clifford twin weber kit

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   The intakes bolt on, but you might need to modify it or use a header, which is costly for a pre 80 engine. Offy still makes a DP intake that will bolt to the stock exhaust manifold. Most you will find are 1980+ and won't work with the early (pre 80) exhaust manifold that bolts to the intake. You can use a 1981-89 258 (4.2L) Jeep exhaust manifold on the earlier head though. That's a much less costly solution than a header. 

While a 4.0L head won't do a lot by itself, if you really want a header and you have a plastic valve cover 258 and want to get rid of that plastic cover too, get a used 4.0L head, factory header, and valve cover. Not hard to fit to the older engine head. Lots of articles on 4.0L head swaps. You can use a 1981-89 2V intake or any of the aftermarket 4V intakes on a 4.0L head easily. The head/exhaust/VC from a junkyard will be no more than a header alone (new) for the 258... and maybe even if the head needs rebuilding. I'd get a head while I could -- stopped making the 4.0L in 2006, so they will start drying up in junkyards over the next 5-10 years, pretty easy to find now. 

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
farna Members Profile Send Private Message Find Members Posts Add to Buddy List Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19682	Post Options Post Reply Quote farna Report Post Thanks(0) Quote Reply Posted: Sep/16/2017 at 11:22am
	The intakes bolt on, but you might need to modify it or use a header, which is costly for a pre 80 engine. Offy still makes a DP intake that will bolt to the stock exhaust manifold. Most you will find are 1980+ and won't work with the early (pre 80) exhaust manifold that bolts to the intake. You can use a 1981-89 258 (4.2L) Jeep exhaust manifold on the earlier head though. That's a much less costly solution than a header. While a 4.0L head won't do a lot by itself, if you really want a header and you have a plastic valve cover 258 and want to get rid of that plastic cover too, get a used 4.0L head, factory header, and valve cover. Not hard to fit to the older engine head. Lots of articles on 4.0L head swaps. You can use a 1981-89 2V intake or any of the aftermarket 4V intakes on a 4.0L head easily. The head/exhaust/VC from a junkyard will be no more than a header alone (new) for the 258... and maybe even if the head needs rebuilding. I'd get a head while I could -- stopped making the 4.0L in 2006, so they will start drying up in junkyards over the next 5-10 years, pretty easy to find now.
	Frank Swygert