question about ordering parts for Mk 2

[Piper]

Ok, you'll all have to bear with me as this is new. The UC we have is a 1942, 85 hp model. Am I to understand that when ordering parts I should really be asking for parts for a 1940 if we're talking about a flat head ford motor? I know that I can get knowledgeable help from Macs but I have a local auto parts owner who wants to help out. He says that he can get "all the parts I need" but I want to make sure I know what to order.

So far I'm getting the distributor adapter plate from Macs; is the coil available commonly? If so, what am I after? The macs site only seems to list a 6 volt 4 cyl model. I'm also wondering about head gaskets. The one I removed has 24 studs, was black (I'm guessing metal not copper). The other thing I need is the exhaust pipe where it attaches to the header off the block. Both sides are badly rusted and have huge holes. Are these available?

Any leads on this stuff really appreciated.

Cameron