Re: 4 bolt block
I saw 6 ex-Vic Police XE falcons at Bayside Holden (now called something else) in late 1985. They were all beige colour, manuals, very basic inside.
I spoke to the sales guy who I knew there and he said they were all "pursuit specials". They were all in the workshop in different states of getting the cop bits pulled out and turned back in to civvy cars (they all had a small silver plug in their roofs and lots of scuff markes on their gutters). One had it's engine out getting fixed and it absolutely had 4 bolt mains. The sales guy said they all did.
I took one for a test drive. Had it going sideways accross beach street from a clutch side slip start..... Very strong - much stronger than a normal 5.8. None of them had power steering. I nearly bought one - they were $8K each, too much for me at the time.