Computer under seat
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Joined: Jan 2001
Posts: 56,992
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From: Virginia
I don't have 1983 diagrams, but in 1981 they had a old EEC computer system that controlled the engine, and the ECU was located under the seat like that. If your truck is all original and that is what that box is, you will have a bunch of wires hooked in and around your carburetor.
Tuned
Joined: Apr 2014
Posts: 319
Likes: 2
From: Houston
WOW, if this is all original this is really good condition. Dash is in one piece and colors arent horribly faded. The dash does kinda looks as it was painted at some point? Also welcome to our Forum.... fellow MTBer here 
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New User
Joined: Jan 2022
Posts: 10
Likes: 1
Thank you! Well I did just put a dash cover on it and just did some black magic on the rest of the dash and trim pieces
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