Hey all - wandering if anyone knows if fitting a gen2 rollcage into a gen1 crx is a hard job or not?

I scored a CUSCO safety21 pt cage for an EF CRX and want to bolt it into the gen1.

Are dimentions of the interior identical, similar or way far off in terms of bolting in a 6pt rollcage?

any help would be appreciated.

cheers

Mike