bluedot38 -
This is the info that you need for fasteners for your front mount ...
I researched the fasteners for motor mounts on my '54. Should be the same as your '50 3104. I listed the GM part numbers and descriptions plus the closest available Fastenal part numbers and descriptions in a Stovebolt post.
HOWEVER - I made a mistake in describing the location of the two thick washers on the front mount. The photo of the completed bolts, washers, & nuts on front mount in my post is also wrong. Denny Grahm desribes and provided photos of the correct location of the thick washers in his post in another thread.
> FRONT MOUNT HARDWARE> DENNY GRAHAM'S DESCRIPTION & PICS OF THICK WASHERS- Lonnie