Lower Control Am U Bolt question
 

Will lower control arm bolts from a square body chev work on the 67-72 lower control arms? The one im wondering about are in this link below, it says the thread size is 9/16-12 in. and the length is 3.250 in.Iv seen posts where people have been using the larger 9/16 size but im not sure if these are the ones since I cant seem to find much for u bolts

https://www.summitracing.com/int/par...on/front-lower

Re: Lower Control Am U Bolt question
 

Dorman 13503.

Those are the ones I used. Had to drill out the holes to fit.

Re: Lower Control Am U Bolt question
 

Yes, 9/16 is the correct size to upgrade to for safety. The originals were 7/16 or 1/2 and there were problems with them snapping while in reverse with the wheels cranked all the way in either direction. I had this happen and it was a pretty scary drive.

Re: Lower Control Am U Bolt question
 

I used those as well on my 72. Didn't have to drill them out though.

Re: Lower Control Am U Bolt question
 

I've had my 71 for 37 years with the factory u bolts and never have had a problem with them. The ramp truck has them and no problems the 68 still has them also. No problems but it's not on the road yet though!:chevy: