Rally cluster in a base 70 swinger dash frame.

Since the whole dash interchanges from 67 on, why not just look and find a ralley frame?
Because I’d heard that some guy modified a Standard dash to a rally dash frame n I wanted to see if I could do it n I did. I also thought if I got one modified then I’d sell it too. Reason why is more guys are looking for metal Rally dash frames than standard n I didnt want an extra standard dash just taking up my garage space