Can a 64 be rebarreled with a 20" 94 barrel without too much cost and effort ? Have a chance at trading for one that's had the barrel cut down to 16".
The forend dovetail may not match. If I were going to the trouble and cost to rebarrel it, I would find a correct barrel or keep it as is. There's a couple M64 barrels on ebay right now.
M64 BARREL MOD 64 BARREL MODEL 64 BARREL 
