Long time no update.
G54 is on the stand in the shed, ripped it apart to discover shagged balance shaft bearings and a couple broken rings. No bore damage though, thankfully. Bores are bloody brilliant, no wear lip and there's still a faint crosshatching from the last time it was re-ringed. Standard size, too. Gonna be able to get away with just a re-ring and a hone, which is always nice.
Also now has Magna rods, replaced them all to avoid balance issues.
Balance shaft eliminator kit, new rings and a hone, come at me. Should be running soon, just needs reassembly now.

Oh, attempted to weld up the front half of the exhaust as well. It's basically that set of extractors with a 2" in/out 18" hotdog (stole it from an N13 Pulsar with a ghey cannon, lol) welded to the end, and a slip joint welded to the end of that to attach it to the rear half of the exhaust, which will be stock for now.
Didn't *quite* work. Birdshit welds aside it's held together fine, no holes or anything, but there's a bit of cut/weld required so it lines up right. As it stands, the aforementioned slip joint is about 30mm below where the stock flange would be. Will get onto that tomorrow.