1966-81 Chevy H/J Series

[ClassicTVMan1981X]

What do you remember of the 1966 to 1981 Chevrolet H/J series 93" BBC conventional cabs?

Screamin Detroit Diesel 653 C70 - YouTube

(1966 Series HV70 with Detroit Diesel 6V-53N engine)

Chevy Dumptruck - YouTube

(1978-81 Bruin Series HY80 with Cat 3208 engine)

Is that a Bruin I see?!? - YouTube

(1978-81 Bruin Series JJ90 with Detroit Diesel 6V-92TA engine - it's the light blue truck)

HOW TO IDENTIFY AN H/J SERIES

1966-1968 = Red Chevy bow tie logo on hood, C-H-E-V-R-O-L-E-T lettering on grille just below. Tonnage series emblem (70 for diesel models and 80 for gas models) is on front fender right next to the cab door.

1969-1972 = Blue Chevy bow tie logo on hood, same lettering style for grille as '66-'68. With the 1970 addition of the Series 90 (and related engines, including the Detroit Diesel 6-71 and 8V71), some models with the tilt-open hood had a different grille. Tonnage series badge (70/80/90), with the same blue Chevy bow tie and red background where tonnage series number is, is slightly re-located.

1973-1981 (except Bruin) = Gold Chevy bow tie on hood, same lettering style for grille on models with butterfly hood as '66-'68, and same grille on models with tilt-open hood as '70-'72. Same tonnage series emblem placement as '69-'72.

1978-1981 Bruin = Newer gold Chevy bow tie on hood, and grille below (on tilt-open hood models) loses the C-H-E-V-R-O-L-E-T lettering. Bruin emblem is on front fenders, and the Chevrolet 80/90 Diesel emblem is on cab door.

Starting in mid-1979, series designations were streamlined. All models in series 70/80 become J80s regardless of axle setup, and the same went for all series 90s that became J90s. So, how would one designate a tandem-axle series J90 internally in regards to the '79-'81 Bruins?

ENGINES
GMC 401 V-6 = used on gasoline Series 80 models with engine code "?" (1966-74)
GMC 478 V-6 = used on gasoline Series 80 models with engine code "?" (1966-74)
Chevy 427 V-8 = used on gasoline Series 80 models (incl. Bruin) with engine code "?" (1975-81)
Detroit Diesel 6V-53N = used on diesel Series 70/80 models (incl. Bruin) with engine code "V" (1966-81)
Detroit Diesel 6-71N = used on diesel Series 90 models (incl. Bruin) with engine code "I" (1970-81)
Detroit Diesel 6V-92T/TA/TT/TTA = used on diesel Series 90 models (incl. Bruin) with engine code "J" (1976-81)
Detroit Diesel 8V-71N = used on diesel Series 90 models (incl. Bruin) with engine code "H" (1970-81)
Chevy Toro-Flow DH-478 = used on diesel Series 70 models with engine code "M" (1966-72)
Chevy Toro-Flow D-637, DH-637 = used on diesel Series 70/90 models (the latter with 93" BBC only) with engine code "J" (1966-72)
Cat 3208 = used on diesel Series 70/80 models (incl. Bruin) with engine code "Y" (1975-81)
Cummins N series (NH-230, NTC-290, NTC-350, et al) = used on diesel Series 90 models (incl. Bruin) with engine code "N" (1970-81)
Cummins V-903, VT-903 = used on diesel Series 90 models (116" BBC only) with engine code "?" (1970-76)

Please feel free to reply with any additions or corrections.

Thank you,



Ben Edge