I've been asked to build a couple of boxes for a local reggae sound to house 1960's vintage Goodmans "Axiom 91" 50 watt 18" drivers. The owner wants to use them as mids, though I think they were designed as bass drivers. apparently they came out of "some wardrobe-sized boxes" the owner no longer had space for. My initial thoughts are either: 

a) build Imperials for them so they can be used for bass 

b) build open baffles so they can be used as mids 

c) design up a mid horn for them.

He also has a 400w monster-monster valve amp/space heater awaiting repair which will be used to drive them. 

quick googling indicates a lack of available T/s params, which is a problem - anyone got them?

Out of the 3 options which one would you guys go for?

cheers for any help

matt