I found this:
https://rodandstyle.com/blogs/rod-an...d-distributors
Sounds like you may have the wrong timing cover , it could be from a later model engine and somebody has fiddled around and fitted it onto your engine. Or, the camshaft is the wrong type.
Sounds like the truck came without a distributor fitted ?
Found this on a forum:
you can buy an adapter plate to convert the three bolt front cover to a two bolt Crab (42-48) distributor, That then opens up a world of aftermarket distributors, or a good rebuilt stock one, which if done right are a great upgrade over the earlier diving helmet dist. someone will chime in where they are available in the states im sure. If you RANG Bubba, no doubt he would have given you all this info directly, so try that.
The write up is a good read and the valve length jig was a nice solution ! You did well with the off-hand grinding of the valve stems.... I am not that brave.
I remember doing the valve seats and clearances on the 85hp motor in my 1941 army MCP 11D truck , it had the divers bell dissy. Hillman spares had new split guides for $2 each pair !
Off topic: you can clean up some types of valve heads by machining rather than grinding them . I have done this on a Holden Red Motor , the valves cleaned up well with a HSS tool. The Vintage car engine business down the road from me used to machine valve heads down to size to suit whatever he needed but this was back in the pre-unleaded fuel days.