I don't think the manifold is the problem, it's definitely exceeded my expectations. I'm leaning on it being an angle problem that's being exacerbated by being overtorqued. There's not too many intakes out there with the magnum bolt pattern but I've had my eyes on a few for a while now. If I end up needing to I have no problem with grabbing a new one.
If you think it is a "angle problem" how are you gong to correct it? I dont see changing the angle of the head surface very easily. That would mean correcting the angle on the intake manifold.
If it is that fair off there is no sealer on the planet that going to fix it, I never was a fan of stacking gaskets thats just a crutch.
Partner its your time and money but IMO you are chasing your tail.
It will be interesting to see which path you go down.
Good luck
