When experts in Pakistan say, "Get rid of 2F motor, 1st thing! "
Take their words...
BUT if someone wishes to learn more about function of double/single butterfly, smog, rich mixture, fuel jets, carbon, vacuum chokes, 2 min/lit, adapter plates etc etc... then KEEP ONE!

Characters shown in the the picture are from:
(clockwise from fixed one) Suzuki Khyber, Corolla '86-'88 1.6, Daihatsu Cuore, Toyota 3F.
(not shown) 2F original from this vehicle, 2F original thankfully provided for testing by brother @nOmS6.
Moral of the short story: Never give up! Diesels are there, anyways 