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Radius Arm Interchange

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Old Aug 13, 2014 | 07:44 PM
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Radius Arm Interchange

Greetings,

I spent a good deal of time searching for this subject before posting, and if it's a repeat question, I sincerely apologize.

I own a 1977 F100 2wd Flareside with a 351M. In preparation of radius arm bushing replacement, I noticed that my right side radius arm has a slight upward bend. I used to do alignment work, and know that back in the day it was not uncommon to bend the radius arm slightly to correctly set caster angle (although I personally never did it, my boss would occasionally do so for customers).

Short story long. If in fact, this is not a intended bend and I must replace it, I am curious if the radius arms from a 2wd F250 will interchange?

My suspicion is that it won't as I have learned (from this forum) that F100 and F150 will interchange, but no mention of F250.

Any ideas? Any help will be very much appreciated.

Take care,
Jesse
 
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Old Aug 13, 2014 | 09:24 PM
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They appear to have the same arms only real thing different is the spring rate for a 2wd. Should fit just fine.
 
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Old Aug 14, 2014 | 01:06 AM
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Thank you for the reply. I was looking at them at the junkyard today, and visually there seems to be no difference, but I wasn't sure. Only 73-79 trucks in the local u pull it are F250 2wd. I would rather buy from them if possible.

Thanks again,
Jesse
 
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Old Aug 14, 2014 | 03:33 AM
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Two things to consider without consulting an MPC

I would replace as a pair to match up any differences not visible to the naked eye

The F250 had around three GVWs and the lowest rated F250 did share some brake/suspension parts with the F100/150


If Mike or NumberDummy or a couple of others have more concise info..
 
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Old Aug 14, 2014 | 04:12 AM
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Radius Arm Interchange

Originally Posted by sleddogg
1977 F100 2WD / Only 73-79 trucks in the local u pull it are F250 2wd.
D5TZ-3A360-A .. Radius Arm-Right/Left is the same / Obsolete

1975/79 F100/150 2WD / 1975/79 F250 2WD Regular & Crew Cab / 1975/79 F250 Super Cab except with 8,100 lbs. GVW

GVW stamped on the 3rd line-far left of the Warranty Plate, located on the left door face below the latch.
 
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Old Aug 14, 2014 | 04:39 AM
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I need to get an MPC
 
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Old Aug 14, 2014 | 12:36 PM
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Outstanding. Thank you all for the replies. NumberDummy, thank you for the part number and info, it is all perfectly clear for me now.

Many thanks,
Jesse
 
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