BlackRocket

I cannot seem to get the large 3" cotter pin through the holes that are in the rear frame box. It appears that one side doesn't even have a hole drilled.

Does anyone know if the small holes were drilled by the factory?

Also, is there a better way to secure these alignment shims?

I was thinking a short 8-32 ss bolt with fender washer separately on each side may be better?

Thanks!

Rescue Rogers

I used saftey wire. Its cheap and easy and is easily replaced if it starts to look crappy. And I dont have to worry about it falling out.

Alan 71

Hi BR,
Depending on the year of the frame it may not have originally had the holes drilled for the alignment cotter pin.
I'd think though if it has one... it would have had 2.
The change to the use of the cotter pin had occurred by the Fall of 1970.
This is a typical location for the cotter pin.
Regards,
Alan

Street Rat

Never even thought of that.

It works.

JoeMinnesota

My 1970 (mid-year build) does not have the cotter pin or holes.

BlackRocket

So, if the factory did not have the holes...do the shims stay in place just by dropping down below the lower lip of the box?

Thanks again!

Faster Rat

Mine do now...since putting in the correct shims that have not been altered by Bubba's Git Her Dun Kwik alignment shop.

JoeMinnesota

Yep - Mine should look like Faster Rat's (and WILL when I'm done), but right now 1/2 the shims stick out the top of the opening. I am cutting out the original trailing arms right now to replace with new offset arms.

00fxd

I used to rely on the shims resting "below grade" until I noticed them working their way up at one point. They were fine for a long time and then ..... So I drilled cotter pin holes in my '65.

Crimson Thunder

That's strange, my March built 1970 has them.

edk136

So does my February built 1970.

JoeMinnesota

Barry's70LT1

My '70 (June Build) has the cotter pin holes, however the original shims had "captured" holes, not slots, so no cotter pin from factory. When I did the trailing arm rebuild a few years ago, I used the slotted shims and the cotter pins.