well, just by the material its made of, will give you an IDEA of what its for..
if its cast iron, its either an early CIS-basic dizzy, or else it could even be a CIS-Lambda dizzy.
if its aluminum, then its for CIS-E/M
the 2 electronic versions of CIS were the only models to get an aluminum fuel dizzy..
and im talking about the actual fuel dizzy, the part where the fuel lines all hook up, not where the air intake hooks up to it.. the fuel dizzy and air sensor plate housing are separate pieces..
looking up the part number will be the best way to find out what it is tho.. just google the 9 (or 10) digit part number..



