The pickup hole is for a strainer bracket, used only on nth/south engines.
Straps are generally a square section (cheapo?) steel bar, bolted on with the cap machined flat first.
I made my own from tuff EN25 for the 1412 stroker, but I shaped it to fit onto the standard cap.
Like this-

Note the strap is a little short- it's all the EN25 offcut my mate the toolmaker had. Works fine, it's now in Gafmo's van.
_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
