I bought a front weight bracket from a member of wfm last week for my 316H2 (1989 316 Onan with H2 hydraulics). Here is the bracket when I got it.
I ordered 2 of these spring latch pins from etrailer: Weld on Spring Latch Pinsl
After welding them on and some studs in the lower holes, here it is now:
Some black paint and a couple of more suitcase weights, I'll be ready for plow day.