Re: Gaskets for EFI manifold change.
You won't need the 1250, unless you intend to port match.
The 1250's are way bigger than the lower ports and bigger than the E7 ports.
There are stock replacement gaskets that are smaller and cheaper that will do the same job.
I get my stuff from Scott at Auto power parts, near Brookside. Or Performance Wholesale on the south side.
All intake gasket sets should include the cork gasket between the heads.
And unless the other gaskets were damaged when you removed the parts, there shouldn't be any need to use new gaskets.
best to use a bit of sealant on all gaskets though, just for piece of mind.
ED Fairmont Ghia 5.0L