rally vs standard dash frame ?

can the rallly dash be bolted/modded to a standard dash frame

the rally dash frame
we have is rusted at the bottom
I can cut out the rust and splice in a section from another standard frame



we have this one that is out of a 70 also- headlight switch seems to be in the same position
we are taking it out anyway to put a fiberglass one in



That why, I was thinking if I could use the standard frame and convert it to a rally

Thoughts??

Thanks> always trying to learn