When I first fixed my 81 linkage, welding, grinding, filing, I used new plastic bushings.
Well they did not last a year so I went with hardware store brass bushings.
Yes I did need to drill out the holes a little to fit them.
They been in for a few years now.
The thing I have a worry on is the motor side pivot of the frame cross shaftn on my 300 motor.
The one with the truck I fixed 3 times before I was able to find one on Ebay, still looking for another cheap.
I had to use the one I got off the bay before I had time to get others made from a local machine shop.
Dave ----