527ci is the biggest LS I've heard of, but Phonsy and his crew don't do too many - they're really a competition boat engine, though they did have one in a VF Commodore (Chevy SS) demo car for a while just to stir up some interest. We also featured that car in the magazine I write for but I can't find the feature online...
https://www.whichcar.com.au/features...-as-you-can-go