Had countless issues with leaks over the years which saw me do so many things. I’ve just drilled and tapped my head and inserted M10 1.5 heli coils. I’ve opted to put in studs instead of the bolts which this model came with. Got the study’s from Ford which are cool because the have a socket end on them to put them in and out. Plus they have a 1.25 thread on the manifold side for better grab. Also opened up the manifold gasket because the ports are not big enough. Put some new studs in the turbo side and I did use a gasket plus double nuts for a lock nut. If this doesn’t fix my issue this time I’ll weld it all. Lol