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Old 11-30-2020, 11:40 PM
A Lung A Lung is offline
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Join Date: Feb 01, 2006
Location: Sonora Ca
Posts: 144
Bed Swap

Possibly buying a step side bed off a 66 J200 question is will it bolt onto my 71 J4000 fleet side. Thanks
So much junk so little time.
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Old 12-02-2020, 09:53 AM
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tgreese tgreese is offline
Join Date: May 29, 2003
Location: Medford MA USA
Posts: 11,347
Originally Posted by A Lung
Possibly buying a step side bed off a 66 J200 question is will it bolt onto my 71 J4000 fleet side. Thanks
Is the Thriftside bed a short or long one? The 8' Thriftsides are quite rare, as I recall. Somewhere in that era there is a wheelbase change, with the same lengths of bed but a different location for the axle.

I believe '71 is 120" (7' bed) and 132" (8' bed). It looks like the wheelbase change (119" & 131") is after 1971, likely 1974. Unfortunately I do not have a reference that tells me the '66 wheelbases, and I can't confirm 100%.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
ECO Green: '15 FCA Jeep Cherokee KL Trailhawk
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Old 12-08-2020, 11:22 AM
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KaiserMan KaiserMan is offline
I got the Willys....
Join Date: Jun 21, 2005
Location: Huntington, Ma.
Posts: 8,709
A J200 will have a 7' bed, your J4000 is an 8' bed truck.

J200/J2000 are all 120" wheelbase. J4000 is 132". J300/J3000 are all 126" except for the J3000 Camper Truck which is 132".
Thomas Russell
1975 Chevy K20 8400lb GVW Camper Special
1971 Gladiator
J2000 Platform-Stake Dump 350/T18

1970 Gladiator J3000 3407Z Camper Truck 350/T18
1968 Wagoneer Custom 327/TH400
1963 Gladiator J300 Townside 350/TH400

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