Here's what I mean about the longer head stud needed. It goes in here. The threaded part is lower in the block. Between the machined surface and the thread, there is a water jacket passage. This must be one of the refinements to improve water flow. Without any krud in the block, it's easy to see (and feel with finger) how much space is allocated for water transfer and cooling.
The water pumps do fit, but will require an additional hole in the block to be eliminated. The hole is a cooling hole that must work with the 8BA pumps. I'll tap it and insert a threaded plug. The distributor plate is perfect fit. In my photo it looks like it's held on with the washers around pump bolts, but it's not. I just needed to take up some of the thread length of the old water pump bolts, because they were crappy thread further up near the head. I have a new full set of external hardware bolts. Don't want to open the packets this early though!
It took me over an hour to insert all of the new head studs (less 2 still needed). I'm glad I bought these. They are all either new, or NOS. The nuts are from MacsAuto.
This is where the govenor goes. Never seen one. Tempted to just make block-off plates for the openings not needed, but if I can actually get the original piece of machinery, that would be better. I assume one of the holes is for oil pressure sender, and two others are for oil in/out to filter???
