All BLITZ and most Flxible 9000 series buses used 6V71 engines, not 6L-71(V8) engines. Four? express Flxible 9000's, were manufactured with 8V71 engines and V-730 transmissions.
Some of the BLITZ rebuilds had new V-730 transmissions while the rest had their original VH-9's.
The following NYC area transit buses, continue to use 6V71 & 8V71 engines:
* Green Bus Lines: 1979 RTS's (1000 series) - 8V71
* Jamaica Bus: 1980 Grumman fleet (400 series) -8V71 and one 1980 RTS with a 6V71
* Queens Surface: 1979 ex Bridgeport RTS fleet - 8V71
* Long Island Bus: ex NYCT RTS's -6V71; Flxible Metro and Grumman fleet - 8v71
* NYCT: some 1981 and 1983 RTS's - 6V71
* New Jersey Transit and Private Carriers: ex NYCTA/MABSTOA Grummans - 6V71
* New York Bus Service: Two 1984 GM Classics -6V71 and GM of Canada Fishbowls - 8V71
Later,
Ray