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Wristed Arm
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The First part of this
is to get a radius arm and some 1/2 plate, I used and old radius
arm I had lying around, its better to use a different one then
the one on your truck because you never know how long it will
take you, so hit the Pick and Pull and grab some. Fullsize and
EB arms are the same arm, the only difference is the sapcing
on the coil pad bolts, but those are easly re-drilled. They
take around 6-8 hours to build
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2
12"long 2" wide1/2 plate 2 12"long 2.5" wide 1/2
plate
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Grind, cut and/or
molest the piece of 1/2" 2 inch wide plate to just barely fit in
between the channels of the radius arm
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| Clean off the of
the Radius arm and weld the filler plate (1/2" 2" wide plate) to the
arm, weld in small tacks so you do not over heat the arm, the
connects your Tacks and fully weld it |
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Grind your welds
down on the filler plate so it is flat with the Radius arm, then
get the Piece of 1/2" that is 2.5 inches wide, you need to cut
it down to fit on the outside of the arm so you can weld it to
the top of the channels and the top of the radius arm, this way
it will be flush, (it does not have to be perfect, you can grind
it later) Tack this plate onto the arm so when your drilling your
holes they will all lineup |
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 My
Friend Alex Had a Drill Press he was willing to let me use
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Drill it out!,
if you do not have a press find a friend with one ( like I did)
because you will need one, I started small and Went up to a 1
inch hole for the Pivot bolt and 7/8 bolt on the pinning bolt,
I put the 1 inch hole as close to the C as I could, the 7/8 pinning
bolt siting about 4-5 inches back from the C |
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| After your Holes are
drilled, knock off the top plate that you tacked on and right behind
the pinning hole cut the arm in half, the on the back half of the
arm cut about another 1 1/2 inches off the arm for clearance when
the arm pivots, then check this and sure you have ample room for the
arm to move. |
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Ahh a nice ban saw will make short work of the
cutting |
Tack weld your top plate
back on and double check all of your bolt hole, and the movement of
the arm.
I then welded a 1 inch .125 wall DOM in the pivot hole to give it
something to rub against, I then used 2 7/8 Grade 5 bolts and nylon
lock nuts to hold it together.
You can also add another piece
of 1/2 plate to the back half of the arm, on the top of it to help
strengthen it up, but I had some good penetration so I did not do
this
I then added a shock mount,
I mounted as close to the C as I could, I used some 2x2 and cut 1
of the walls off then welded that to about 1.5 inches of 1 inch OD
round tube then welded that to the arm
Bolt it back on the truck and your done, ready for flex
If you are still unsure of doing this, I can do it for,
E-mail Me For pricing and options, I am in the East Bay area,
CA, but will ship anywhere.
-Mark Harris
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