91 MLS header gasket source?

Well our 91 is back in the shop needing new header gaskets. I want MLS gaskets. Anyone got a good source for such gaskets?

 

LCE has them. I've ordered from them I. The past and always been happy.

 

Thanks. Just getting tired of replacing them. Want multi layer steel ones now.

 

I would do head studs as well while it's apart if you haven't yet. I went through two head gaskets in my 3.0 in 10k miles. I went with ARP head studs after the second time and haven't had any issues since.

 

If you do go with MLS I would get the heads and block surfaced. Metal head gaskets require a smoother machining finish than using a standard gasket. I've also heard using copper sealant helps as well. I have no experience with metal head gaskets, just things I've heard over the years.

 

Having been here and done this to my 91 30K miles ago. Get the Green Lee MLS HG's form LC Engineering they have a kit and also get the ARP head studs from them as well. Get the block decked and specify 25RMS surface roughness if they can't do that then you will need to lap the decks and heads and make sure they remove the alignment bushings from the block so you can figure 8 the tool rest from a drill press or some other heavy flat piece of plate that you can glue 320, 600, 800 and 1200 emery paper to. The heads will clean up very quickly with WD40 used to flush out the aluminum from the sand paper. The block being cast iron, not so quickly, but the tell tail indication that you are getting it really flat is when the surfaces between the cylinders on the block start to get some cutting action from the lapping process. Large sweeping figure 8 motions and continued rotation of the tool rest gets the sand paper to wear evenly and help keep the flatness in check. The machined surfaces from the machine shop will never get the area between the cylinders right as the fly cutter tends to dip down as it passes over the openings for the cylinders. I can't remember if I had to pull the valves to lap the heads because they maybe proud of the heads surface on the 3.0L like they are on my lotus 907 engine. So that could be a bit more work! I recently yanked the ruddy dick tube and EGR from the plenum and blocked off the opening. Along with the intake and exhaust mods and the port matching I did when I rebuilt it, this last modification to delete the EGR is one I highly recommend as the 3.0 easily gets to 90+ MPH on the commute to work when I can miss the rush hour!... Getting about 11-13 MPG on most fill ups over the last several months.

Tool rest and recently lapped head from my Jensen Healey for inspiration with freshly cut valve seats.
The heads will become like a mirror finish when your done.
The decks will see the machining marks from the fly cutter disappear.

Tool rest shown in foreground above with emery paper bonded to it with 3M spray adhesive.
Once its done replace with next finer grit paper and do the deed all over again till its showing improvement!
A nice bright light and brake cleaner to get the head or deck free of the residue works well for accessing the finish that you have managed to obtain.