On a few of the mid-70s pick-ups I have noticed something different. I recently had to rebuild my 203, the donor TCase, on the extreme right side of the chain case portion there are two external holes for a mount of some sort. I went to the scrape yard and found this "mount"; it is a rod that bolts to those two holes and then runs up to where the tranny bolts to the engine block and is secured by one of those bolts (tranny to engine block). Is there a purpose for this "rod" and if so what is it? I have noticed several other vehicles with the holes for the rod, but it is not installed. To me, when looking at it installed it does not appear to have any function; seems too light for any kind of support. Ideas???