GM Small Block Damper Plate 1004-650006 Damper plate connects for GM small block marine engines to Velvet Drive 71C and 72C transmissions. 6.66 in. radius triangle shape 26 spline 6 red springs Fits GM 262, 305, and 350 cu. in. marine engines Mates to model 10-17 (71C) and 10-18 (72C) Borg Warner Velvet Drive inline transmissions Mates to model 10-04 (71C) and 10-05 (72C) Borg Warner Velvet Drive V-drive transmissions Replaces Crusader 97596 Replaces Barr AS4-K2C Can be used as replacement for Mercury 47608A1, though they are slightly different in physical appearance