Rear bumper
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Junior User
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Rear bumper
Ok. I have 1 last part to purchase. Rear bumper. Its the contoured bumper. Lmc offers 2. One says 37.5 mount holes the other says 40. Where are they measuring from. The bumper bolts on top of the bumper? Or what?
Fleet Mechanic
Joined: Jul 2017
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From: KY
Numbersdummy can tell you for sure, think its the between frame measurements but cant remember for sure , here is an link that may help https://www.ford-trucks.com/forums/1...79-f250-2.html
Moderator & parts slinger
Joined: Feb 2007
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From: S/W Missouri, Polk county
IMO I'd measured where it matters....at the rear of the frame rails where you are going to bolt the bumper on. Do you have the special...well pretty much impossible to find and purchase (due to NOT being reproduced) mount brackets for said contour bumper?
ND says....D3TZ-17906-B .. Chrome Contour Rear Bumper-Use with 37 1/2" rear frame rails / Reproduced. 1973/79 F100/350 - 1978/79 Bronco.
ND says....D3TZ-17906-B .. Chrome Contour Rear Bumper-Use with 37 1/2" rear frame rails / Reproduced. 1973/79 F100/350 - 1978/79 Bronco.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
1965/72 F100/350 // 1973/77 F250 4WD (High Boys) // 1973/79 F350 Cab & Chassis & Regular Cabs on the 140" wheelbase.
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37 1/2" width between the inner frame rails behind the cab:
1973/79 F100 2WD/4WD & F250 2WD // 1973/79 F350 except as noted above // 1975/79 F150 2WD/4WD // 1977 F250 4WD from serial number Y20,001 (not a High Boy).
1978/79 F250 4WD // 1979 F350 4WD
Fleet Mechanic
Joined: Jul 2017
Posts: 1,276
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From: KY
It appears the 40" you speak of is for a Bronco if this is what your looking at on LMC
49-9542
CHROME REAR BUMPER PREMIUM
36-1/2" MOUNT HOLES STYLESIDE 73-79
49-9544
CHROME REAR BUMPER PREMIUM
40" MOUNT HOLES STYLESIDE &
BRONCO 73-79
49-9542
CHROME REAR BUMPER PREMIUM
36-1/2" MOUNT HOLES STYLESIDE 73-79
49-9544
CHROME REAR BUMPER PREMIUM
40" MOUNT HOLES STYLESIDE &
BRONCO 73-79
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
It appears the 40" 
you speak of is for a Bronco if this is what your looking at on LMC
No such thing as 40" width between the inner frame rails for any 1973/79 F100/350 & 1978/79 Bronco.
49-9542
CHROME REAR BUMPER PREMIUM
36-1/2" MOUNT HOLES STYLESIDE 73-79
49-9544
CHROME REAR BUMPER PREMIUM
40" MOUNT HOLES STYLESIDE & BRONCO 73 -79
you speak of is for a Bronco if this is what your looking at on LMCNo such thing as 40" width between the inner frame rails for any 1973/79 F100/350 & 1978/79 Bronco.
49-9542
CHROME REAR BUMPER PREMIUM
36-1/2"
MOUNT HOLES STYLESIDE 73-7949-9544
CHROME REAR BUMPER PREMIUM
40"
MOUNT HOLES STYLESIDE & BRONCO 73 -791978/79 Bronco uses a completely different bumper than 1966/77.
1978/79 Bronco uses the same contour rear bumper as 1973/79 F100/350's with 37 1/2" width rear frame rails:
D3TZ-17906-A Chrome & D3TZ-17906-B Painted .. Contour Rear Bumpers
But 1978/79 Bronco's use different bumper brackets than F100/350, because Bronco's have a rear stone deflector that the pickups don't have.
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