That is #3 of the 5 McLaren blocks. I have #1 and #4. I had heard that they might have water leaks so I had mine pressure tested and all was well. Think one of the blocks is being run currently with no problems. Both of my blocks have the welded on pads to make the 4 mounts on each side the same height. They were being built as dry sump but I will likely run a remote filter unless I use the crank and rod set I got with it. Problem with that is its a 2.93 stroke so without boost it would be a little weak. Around 305". Both mine are already bored for 60mm cam bearings and, I think, 1.06" for lifter bushings. The 2 cranks are Bryant and the are cut on the snout so the don't fit the oil pump. Have an ATI damper with the drysump cog on it but I guess it can be set up for a single stage external wet sump.