Originally Posted by diyanich

Remove the accumulator manifold and replace the gaskets.
If you don't it, will be a real pain to do it once they start leaking.
I've done the Valley Pan gasket and rear manifold at the same time,VP was seeping,and manifold was losing a lot.
Once I replaced that I had a Water pump gasket failed,after replacing the WP along the gasket,I had transmission heat exchanger x–rings leaking.
Conclusion is that replace as many gasket as you can at once.Unless you like to repeat the same process endlessly.