Cracked exhaust manifold 190 gas

I can not find a replacement exhaust manifold for my 190 gas, it appears they aren't available NOS, aftermarket, or used and from the sound of it, I wouldn't want one anyway because they always crack. One crack had been welded and didn't hold.. I think I can clamp a soft aluminum gasket around both cracks and install new manifold gaskets(readily available) and be OK.
Or, perhaps others in this situation have found better a solution ?

I would like to replace the intake manifold gaskets also because I think they're leaking and causing it to run rough after an hour or so of proper operating temperature....but I cannot find them anywhere.
Can anyone help me find them ?  It's an early 190,  sn# 1364 if that matters.

Thanks


Edited by Jamz - 10 Apr 2017 at 4:11pm

Sorry Farmboy, I fat fingered and sent the post before writing it,
it should be updated now.

Part# on my cracked one is 4023626

What about one off a combine engine??? different OR same??? thanks; ac fleet

A new A-C replacement manifold is probably different than the original. A-C took out some of the sharp bends in the runners to help keep the cracks from forming.

The combine manifolds will work and as was stated earlier in multiple posts the later ac manifold was redesigned without allis chalmers written on the exhaust side. The later g gleaned and we also have a 1970 190xt gas with the later style. They do not have the issues breaking. Also definitely have it surfaced or be checking this. I like to do the exhaust and intake together bolted up so there is as little chance of a bind as possible.

Andy