Forum Literature Section has the early model parts books. In the early format all current models were included, so it takes a while to find the parts numbers, but the illustrations of individual parts are pretty good.
Lots of the fixings are common to the later type engines, so are readily obtainable. But in essence the studs into alloy were always Whitworth, CEI/BSCy at the nut end.
As noted, the Literature Section also contains a Nut and Bolt Chart, useful most of the time, but from experience, there are a few blanks....
A few assembly hints.
Pass the two lower rear crankcase studs into one side of the crankcase castings ....they can not be added once the cases are together. Found this out the hard way.
Also easier to assemble camshaft and its drive gear before joining the cases.... then it's no problem to hold the cam still to tighten the nut. Seal the oil pick up pipe to the crankcase, and check for an airtight bond. A leak here will result in a lack of crankcase scavenge and another total teardown to remedy.
Don't forget that anti drain ball valve and plug.. easily overlooked and another potential calamity. Hope you fitted the oil slinger into the crankcase before that nice new main bearing race went in.
Swarfy.
