Do you mean will a Koni B14 insert fit into a B13 housing? They should - I believe the B13 and B14 were basically the same dimensionally.
You can also run a Maxima housing on the front if you want to bump up to that insert. My old setup was Maxima fronts with B14 inserts in the rear. Here are many of the dimensions:
(click for bigger, so you can read it.
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