exhaust manifold gaskets- leaks

I put a drivers side exhaust man on from a 231. I used a 225 gasket. I discovered they dont cover the bottom of the ports. My question is:
If I order man gaskets for a 1985 Buick Regal 3.8 L Non-turbo will these gaskets work?

Josh

 

try to use the gasket for the same motor the manifold came off of.iput an exhaust manifold from a 1979 v6 on my 225 and used a gasket for a 1979 and it worked.

 

I dont know what it came off of. I bought it on ebay listed for Buick v6 231. It is the flat style and it bolts up nicely, however not sure of the different style exhaust ports/ styles and changes in regards to the gasket. I layed a 225 gasket on the manifold and there is a gap at the bottom.

 

I think I answered my own question. I went to car-part.com. I put in for an exhaust man for a 1985 Buick Regal 3.8L non turbo. Some of the finds were listing the same # (25516359)as on my manifold even from other models. So I guess they will work.

 

i have an extra 1979 v6 manifold,i may put a 225 gasket on it,mark it and try to grind it,if there is enough metal,to match the 225 head.