Need help for ebay auction ASAP!

Need exhaust manifold help!

Will a newer (91+) exhasut manifold fit on a older (1990) 4.0? I dont need the heater duct thing because Im runnign a different intake. Are the head ports different?

I noticed looking at ebay auctions the place where teh S pipe bolts to is different. Could I use a newer S-pipe? Will the newer S pipe have the 4 bolt flange for the cat?

I think your talking about a non HO and HO manifolds. If so the ports are different on the heads.

JoBo