Are these factory mounts? If so , does anyone know the load capacity?
I have seen them on 1st gens a few times but never knew if they were an OE option or not...

 

Not OEM.

The top is rated for about 75lb total.

You'll find this limit listed in the owners manual. SomedayJ scanned his for us awhile back, Google will find it. "Site:yotatech.com 1st gen 4runner owners manual"

 

Great thanks!

 

I think they are extensions of the drip rail for mounting a rack to the top.

 

not oem. i’ve added a pair to my 1st ‘87.

 

As others have said, those mounts / brackets are not factory Toyota.

I have those same mounts on my GemTop topper on my pickup.

 

Nice!
Brand or link?
Please, upload pics of the inside.

 

thule, purchased through LL Bean as a set of four (perfect for two 1st gen 4runners).

i found a few pics of them in use with my 1960s-era roof racks:

 

Thanks for the great info guys. Much appreciated....
Nice truck Wally.

 

Thank you. Good idea. I like the way it looks. Nice truck!