225 odd fire

I was given a pair of 231 heads in echange for my 1971 225 heads for a motor I was rebuilding. I only came to find out a year later when I was assembly her, that the heads are from a 1983+ 231EF. The 225 has an Offenhauser dual plane intake manifold. Will all these parts match up or is there some work involved to make the heads work with the 225 OF and the Offy intake. Hopefully I wont have to get brand new heads.