Awesome info mate, thanks very much! I'm just about up to ordering some bearing sets for my engine now. I see ACL now make big end bearings so I may go with those, then either King or OEM for mains - I've seen more posts than just yours regarding King's big end bearings not working without resizing rods or journals.
There's a group on facebook called "Boosty EZ Boiz" if you're interested in joining that - There's a post there that pretty clearly shows excessive bearing crush at the parting lines with King's installed in a factory-sized conrod.
At the moment I have my block at a machine shop for closed-decking, block o-ringing, and drilling/tapping to suit the 12mm head studs. Have gathered rods, valve springs, 12mm 625+ studs in the meantime. Just need to make a decision on pistons and weigh up some head work like oversize exhaust valves + porting perhaps