Just got a used 'Corbins' 2" square reciever for my '89 240wagon.

I had to remove a rear toe strap loop that was bolted to the frame, and cut away there rear valence.

The reciver has 3 holes on each side. I found the right size class 8.8 bolts for the rear holes, but what do you do on the front larger hole? I could only find a 4" M14 8.8 bolt for it. It will not go all the way through from inside out or vise versa, because of the shoulder on the bolt.

Is that the bumper shocks inside the frame? Can I use a shorter bolt from the underside, into the shock mount? Will this hold the shock correctly?

If not, where do you get a 4.5 - 5" M14 (8.8) bolt without a long shoulder area on it?

I bought a 5 wire converter to tie into my tail lights with. Are there any problems with doing this?

Thanks,