88 MJ exhaust manifold swap to 91+?

[KA88MJ]

Is it possible to swap from an 88 MJ header to the 91+ header? I know the 88 has the extra tube coming off the side, but what else is different, and what kind of issues might one have with the 91+ exhaust manifold on the 88?

[JMO413]

This is how I did it.

 

[cruiser54]

An alternative on exhaust manifolds:

As far as exhaust, you can use the Renix exhaust manifold and be fine.
If you want to use the HO exhaust manifold, you must go with an HO headpipe and screw your O2 sensor into that headpipe. Standard Renix harness is plenty long to do so.
A bung can be welded into the HO manifold to accept the EGR tube.