[macreel]

Generally speaking "yes" you can exchange the
CIS fuel distributors found in VW Rabbits,
Sciroccos & Golfs. Main thing is engine size
and cleanliness. The piston in the center of
the top piece must be bright, smooth, free of pits and scratches.
There must be no air leaks after the flow sensor(whose circular plate must be precisely centered). The pressure regulator must work & provide a band of pressures(check service manual for your engine & year)

Try the '80 unit, after inspection.

G'luck.