How could I tell if my motor which i got from a mass rebuilder is a super six or not? Iordered a 225 but how do I know if I got a 198 or 225?

I believe the supersix is just a carb setup(two barrel rather than one).

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My car may be slow to sixty, but at least it's been reliably slow to sixty for more than thirty years.

In Australia the 2 barrel engines also had a different camshaft, the Pacer 2barrel had 9.2 compression ratio aswell.

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94 Falcon 4.0 auto
70 Valiant 265 Hemi auto
70 Valiant 318, 904, Coupe
69 Valiant 225 auto x 3 (1 sedan, 2 coupes)
64 Falcon 250 2V auto
yes, I have too many projects.

The Super-Six is simply a different carb and intake manifold, the basic engine is the same.
The best way to identify the engine is to look for the ID number stamped into the top of the engine block, behind the alturnator.
There is a little more info posted here:
http://www.slantsix.org/articles/sa-franks-book/pg2.jpg
DD