Hi greydog,
The engine was totally rebuilt as it had spun the bearings, new head gasket, was also skimmed, also it had a rocker cover oil leak so the gasket was replaced too, apparently it had new rings, bearings, new shells-picked up on the shells , new oil pump, lifters as he said they were stuck in, also he put a remap on it after for better fuel performance
hope that helps a bit.. it definitely wasn’t smoking like that before rebuild, I went up road today again and when you flaw it the smoke stays behind on the road then no more smoke untill Next day start up ??