Yeah I don't think 31" across is going to work at all. The Contour radiator is a 26" core just like the 26" mopar radiator. The only thing that's wider is the mounting tabs, so unless the 31" measurement includes those I'd say the SVT fan won't work.
The "trimming" on the Contour fan amounts to removing a single mounting tab on top, it's a very minor trim. Everything else was completely untouched.
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