Sequential circuits samplers

I have a bunch of 3379s from my 2000 that died. 

(before you all start in on me, I still have & use an expanded 2002 with sep outs & so forth; the key assigner failed in the 2000 & WC told me they were unobtainium, so I had to break her up.... I did not enjoy this.)

anyway, I plan to use the 3379s in a couple of other synth projects*, so I have read up on them a bit. there is ONE datasheet for the 3378 & 3379 variants of this chip, & NO mention of design changes or even different batches. if you have found them to be un-interchangeable, something else is likely wrong.

the 3379 has the VCAs set up with a stereo output pair & voltage controlled balance. the 3378 has an input mixer instead, & mono output.

duncan.

(*two at least as alternative filters- I'll leave the originals in- in my yamaha cs30. three or four more in a moog-based project. maybe convert my pro-1 to stereo.)