It's a 273 Commando mill with 10.5:1 pistons and 2658920 heads. I don't know why but someone's swapped out the adjustables and solid stick for stamped rockers and a hydraulic cam. Ideally I'd love to go back to a solid but at this stage a nice hyd flat tappet stick makes more sense.
Unless someone has some 273 adjustables rockers they would like to sell?