G'day Shonky,
It certainly looks as though you have your work cut out for you but you are progressing! About your engine... you should be able to get a manual from supercheap auto or repco or something. Other wise you could check out
OldHolden.com | Old Holden Internet Resource you could surely get some info there, maybe even a manual. Holden 202 red motors are pretty simple engines though. I used to have a manual for my old HG kingswood, I'll see if I still have it. I'm pretty sure I sold it with the car though.