73-87chevytrucks.com
Technical Forum (Read Only) => Accessories and Body Tech => Topic started by: Captkaos on April 11, 2013, 12:21:14 AM
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There are a number of differences in the 1973-1987(91) trucks, the major difference is in the cowl area.
1973-80 trucks cowl area where the safety catch was is all enclosed. Wiper motors arm mount using 2 holes horizontally. Hinges for the hood mount on the fenders.
(http://www.73-87chevytrucks.com/techinfo/hood_hinges/73-80cowl.jpg)
1981-1991 trucks cowl area has a different shaped area with a provision for the hood hinges, (springs mount to the fenders). Wipers arms mount with 3 holes instead of 2. Note the reinforce lip which is longer than the 73-80 version that the hinge mount bolts to.
(http://www.73-87chevytrucks.com/techinfo/hood_hinges/81-91cowl.jpg)
1973 trucks NEVER had drip rails installed from the factory, they became optional sometime in 1974 and by 1975 they were standard equipment. 3 point belt provisions were offered but were not standard until around 1977.
In addition to the above, floors started to be galvanized in 1983 along with a plastic seal attached to the floor pans where most were known to leak.