1986
1981 in Citation.
1995, was the last year for most cars. Anything 96 and newer uses R134a.
2005 was last year
1975 model year.
1995
I believe it was 1981.
The last GM Hummer H3 rolled off the assembly line on May 24 2010.
2011
GM. quit uesing Carburetors back in 1987. Everything is now fuel injected.
All GM OHV truck engines continue to use timing chains. The 2.2 truck engine (not ecotec) also uses a chain.
Some Dodge vehicles actually came with GM carburetors. If the bolt pattern is the same and the butterflies do not hit the intake then it should work just fine.
gm bought allison in 1987
The first distributor less cars started appearing in the mid 1980s the last distributor being produced in about 1990