Copper spray has never really appealed to me with graphite composite gaskets which are already excellent in conformability.
Remember the copper spray is not an adhesive. It is a metal particle sealant which was used a lot on old single layer stamped steel embossed gaskets. This is to seal all the tiny microscopic Defects in a machine head and deck surface.
Modern MLS gaskets are supposedly coated on the outer 2 layers with modern ceiling compounds so technicly We're not supposed to need the copper spray to seal. The imperfections not to mention machining better RA finishes nowadays....
I've seen both copper sprayed and non copper sprayed composite gaskets pushed out underneath the exhaust ports....
I have stopped using permatex " the right stuff" RTV in a lot of situations because of how f****** stuck things get with it.... I will certainly never use that s*** on anything I need to take apart in the future.
On the 442s pwerplant one day it just dawned on me of where that s*** should be used and I believe the last 3 engines I've put together I've done that with...
Double D always told me there are grand national guys that Use construction adhesive And remove their cylinder heads with two six foot bars through the coolant ports
They might be on to something.
Also for ARP studs and composites I go to 87 on all of them and the center 4, I go an additional cross pattern to 94-96. I remember this because 87 grand national and 94 for first 3800 SII.
MLS are a different animal..
I basically do as above but forego the center for additional turns until after I measure and I've had to go up to almost a 104 to get it close to "FLATish"
Spend the money get yourself a straight edge and check your head while It's sitting on the bench across the valve cover surfaces and your rocker stands. Feeler Gages are mandatory but don't forget to measure with the butt end of a dial caliper down to a paint dot or two between outboard studs in the flimsy area.
Check while torqing it down.
For some reason. Along the way they got rid of the Additional step on the center four.
Probably saved money on the assembly line.
From my work it's needed.... The old timers had it right.
Brain droppings fer wki