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Old 02-12-2008, 08:32 AM   #1
larryboz
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1986 Heavy Duty 3/4 ton 454 Question?

What year did the 454 go to 1 piece rear main seal? I think mine on my 86 is a 2 piece and it is leaking. Just picked up truck 2 wheel drive brand new BFG all Terrains 454 runs good carb needs rebuilt, hard cold start Turbo 400, 14 bolt Full floater 4.10 rear end, rusted out rockers and cab corners. What would you guys pay for something like this here is the pic I have of it

http://www.castleboz.com/photos/1986-Chevy-3-4-Ton
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Old 02-12-2008, 12:23 PM   #2
MylilBowTie
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Re: 1986 Heavy Duty 3/4 ton 454 Question?

What size tires are on it? I assume 16's but wondering the size?
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Old 02-12-2008, 09:36 PM   #3
larryboz
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Re: 1986 Heavy Duty 3/4 ton 454 Question?

Tire size is 235 85 16.

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Old 02-12-2008, 10:12 PM   #4
DirtyLarry
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Re: 1986 Heavy Duty 3/4 ton 454 Question?

The big block 1 piece rear main seal was introduced in the 1991 model year on the L19 7.4L engine.
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