Hello everyone! I’m happy to share this little mod I made which makes some of the vehicles from Jazzycat’s classic pack drivable.
This is not a standalone mod, it requires Sk3lecreeper’s “Driveable AI” as well as Jazzycat’s classic pack to work. Extract downloaded archive and please read the README.pdf carefully!

Mod is compatible with 1.52 version of the game. So far 28 vehicles from the classic pack were made drivable:
Buick Century 4th-gen. (1982-1996)
Buick Regal Grand National Coupe (1987)
Cadillac de Ville 5th-gen. Coupe (1977-1984)
Cadillac de Ville 5th-gen. Sedan (1977-1984)
Chevrolet Blazer 2nd-gen. (1973-1991)
Chevrolet Camaro 3rd-gen. Coupe (1982-1992)
Chevrolet Impala 3rd-gen. Sedan (1965-1970)
Chevrolet Impala 5th-gen. Sedan (1977-1985)
Chevrolet Monte Carlo 4th-gen. Coupe (1981-1988)
Chevrolet Silverado 1st-gen. (1973-1991)
Chevrolet Suburban 7th-gen. (1973-1991)
Chrysler New Yorker 8th-gen. (1969-1973)
Dodge Monaco 3rd-gen. (1974-1977)
Ford Bronco 3rd-gen. (1980-1986)
Beater Ford Bronco 3rd-gen. (1980-1986) (Retexture of Ford Bronco)
Ford E-250 3rd-gen. (1975–1991)
Ford F-150 7th-gen. (1980-1986)
Ford LTD Crown Victoria (1983-1991)
Ford Mustang 3rd-gen. (1979-1993)
GMC Sierra 1st-gen. (1988-2002)
Jeep Cherokee 2nd-gen. (1984-2001)
Mercury Grand Marquis 1st-gen. (1983-1990)
Oldsmobile Cutlass Supreme Classic 5th-gen. (1978-1988)
Oldsmobile Delta 88 7th-gen. (1971-1976)
Pontiac Fiero (1984-1988)
Pontiac Grand Prix 5th-gen. (1981-1987)
Porsche 911 (1974-1989)
Winnebago Chieftain (1973)
Vanilla “Farland” bus (as a bonus)

What’s new in 1.4:
This update features major improvement of vehicle stability at high speeds. Top speeds are now higher as well, but it doesn’t mean that Chieftain can now do 150 mph (I’m not sure if it can hit even 90)

Also two new vehicles are available:

Porsche 911 (1974-1989)

Beater version Ford Bronco 3rd-gen. (1980-1986) (I lovingly named it “Old Fart”. Some rust and a few bullet holes but it’ll last You a million miles)

If you like my mod and want to know about updates, report issues or make suggestions, please feel free to join my group on Steam:
https://steamcommunity.com/groups/DjcTP

Credits:
Kawaii Anime Waifu Hunter (author)
Noeny (author of ETS2 Drivable AI mod who helped out a lot and gave permission to use some of the files)
Sk3lecreeper (author of the original “Driveable AI” mod)
Jazzycat (author of the classic pack)
GoingGoingGONE & vial_ (play testing)

Download mods:
https://modsfire.com/4jGK5wWMTD9U3cW
https://sharemods.com/t8v1jzkz3d6l/Drivable_Jazzycat_classic_pack_v1.4.rar.html