Re: 1970 Camaro Rear Bumper Guard
 

I believe on the assembly line the workers would mark and drill the rear valence with a 33/64" drill (Slightly larger than 1/2") and then slip in the Wellnut rubber thread inserts. The nutserts have a bronze 1/4UNC thread insert molded inside and are shouldered. Once the bolt is inserted and tightened, the rubber swells outward, locking inself to the valence. Great for those blind holes where no wrench can go....

Paul

Re: 1970 Camaro Rear Bumper Guard
 

Previous post absolutely correct.......rubber wellnuts/nutserts inserted into large holes, about 1/2". I went and looked at an untouched car today, pulled off 1 gaurd to look and there it was. Car I looked at is of no question, orig paint, orig owner, never apart. And before anybody asks.............no it's not.

Re: 1970 Camaro Rear Bumper Guard
 

They are simular to the radiator nut inserts located on the core support of 1967-69 Camaros. They are located on the drivers side.

I'll have to check to see if they are the same size. If so they are available and would be a perfect substitution.

Rick H.

Re: 1970 Camaro Rear Bumper Guard
 

I believe rad attachment is 5/16, gaurds are 1/4-20. Same type harware but not correct thread size.

Re: 1970 Camaro Rear Bumper Guard
 

The ones I ordered from Modern Chevrolet for the core support, to mount the radiator on the drivers side, were 1/4-20. They may be the same for the guards.