I'd Google the # to try & get the app (year(s)/what eng) so you could possibly sell it to someone doing a resto. If no go then sell it as NIB 70's basic electronic dist. If G does not tell you the CID then measure the lower shaft length from tang tip up to underside of round mounting flange. iirc the lengths are 3.5" 3&7/8" and 4" (B LA RB likely not in order) & the can orientation as you know would pin it to BB or SB