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Old 07-31-2021, 03:31 AM   #1
joey's Avatar
Join Date: Oct 2020
Location: Colorado
Posts: 26
Vehicle: Reg cab 2wd 1989 D21 w/ a motor from an '86 D21
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Default Which Octane fuel for my hardbody? Timing Chain question as well?

Hi guys. Couple questions if I may in one post?

1. I have a '89 D21 that has an engine from a '86 D21.

So, since the '86 engine was carburetated (I was told) and the '89 engine has fuel injected throttle body, I was wondering if I should run ethanol free gas? or does that even matter? What grade of octane should I run?

2. Do I need to change the timing chain and guides at some point soon? The guy I bought this truck from said motor had about 106k miles on it.

R2-D2 wishes he was a D21

Last edited by joey; 07-31-2021 at 12:59 PM.
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