c notch already in, want to move trailing arm crossmember back

[jcblue]

im concerned.. i have already installed my c notch and welded it inside the frame rails.. my problem is after looking at other trucks i feel like teh rear end needs to be moved back some to the wheel will be centered in the wheel opening.. im pretty sure that after i move teh crossmember back the rear axle will not be centered in teh c notch.. I need any advive as to what i need to do.. thanks in advance

[N2TRUX]

What type of notch did you use? Most bolt in C-notches have enough wiggle room that you might be able to go back almost an inch. If not, you might be starting over.

[SCOTI]

What year truck?

[N2TRUX]

From a previous post-

Originally Posted by jcblue

..... im wanting to put some 15x10 on the rear of my 71..

[jcblue]

its a 71 SWB

[jcblue]

and its a CPP notch

[jcblue]

and im not sure if it makes any difference, but i have installed a CPP trailing arm crossmember as well

[SCOTI]

With the bolt-in style c-notches for the 6x-72 'curved' frames, there is some wiggle room (per Ken's description ).

There's 2 ways to alter the C/L of the axle in the wheel-well opening: 1) move the rear back; 2) move the body forward. You can shift the bed as far forward as possible for some of the amount needed.

If I recall, my 68 had the axle tubes toward the front of the c-notch @ full drop (no springs/bags). So moving the rear back .500 ~ 1.00" should possibly be do-able (not all trucks are the same). I don't think you'll get more than an inch w/the bolt-in style c-notches.

But, add the bed shift forward w/a .500-.750" rear end repositioning & you might hit the sweet spot you're seeking.

What truck arm c.member are you using? What drop components?

[jcblue]

My trailing arm cross member is CPP, still have the original trailing arms.. Are the aftermarket trailing arms an exact replica as far as measurments go, or could i be lucky enough for them to be an inch longer? i have not bought any other drop components yet..

[SCOTI]

Originally Posted by jcblue

My trailing arm cross member is CPP, still have the original trailing arms.. Are the aftermarket trailing arms an exact replica as far as measurments go, or could i be lucky enough for them to be an inch longer? i have not bought any other drop components yet..

CPP's center x.member is a 'fixed' unit w/no provisions for adjusting the wheelbase. The CPP x.member will require drilling new holes in the frame to get the rear-end further back (not too big of a deal if the truck is taken apart).

ECE's truck arm mounts are bolted to the x.member so they can be unbolted & spaced (easy & cheap).

Most aftermarket truck arms are stock length. Porterbuilt is the guy you want to go with to get what you need. Give him a call or send him a PM.