THATS A GEM YOU HAVE THERE. LOL J/K
I think i have it narrowed down for you.may be some of these cars out there somewhere..........
should be off an 1977-1980 CHEVETTE..................
THE part no. for 1977-1978 is 462792 1.4 eng or the 1.6 eng takes the same head
part no. for 1979-1980 is 14019830 1.6 eng only
not sure why different part noi for these years but i would bet it would fit any 1.6 eng 1977-1980
throw it up on e-bay see if yoy get any hits on it...........
i had a old 1.7 encore head once brand new,was gonna tosss it,put it on e-bay and got 285.00 out of it.
down south i'm sure some off these cars are still on the road,these little engines lasted for ever.
P/S---- hope you didn't take CODY'S advise and threw it over the side of your boat.
Dave............................