Lawton, be aware that a pre-1984 320 may be a bit wider than the reissue 325s and will not fit in a reissue case. I know this because I bought a 1981 320 MG without a case and got a non-reissue 320 HSC on eBay that just barely fit. When I checked the 320 with my 325 reissue cases, the guitar was too wide and would not fit at all.
It is better, of course, to know useless things than to know nothing. - Seneca