Info on Holley 3 Barrel Motion carb?

[AMANOCC]

Would anyone know if this particular 3 barrel is vintage "Motion" or not? How long did holley make this carb? Any other info would help. # 's on carb are 3916-1S 832...metering block 5615.
http://images.andale.com/f2/115/106/3580189/1132765017427_DSC05977.JPG
http://images.andale.com/f2/115/106/3580189/1132276484758_DSC05978.JPG
http://images.andale.com/f2/115/106/3580189/1132295153841_DSC05979.JPG
http://images.andale.com/f2/115/106/3580189/1133302992998_DSC05981.JPG

Thank, Alec

[COPO]

Those carbs seem to be pretty common and are on ebay all the time for $100-$200 range. There should be a date code stamped into the carb along with the model number which will help to determine the CFM. I think they came in both 950 CFM and 1050 CFM.