I did it to a block, but I never built the engine. I still have it and all the major components to build the bottom end (crank, rods, pistons). It's an odd combo...2.5 crank welded and offset ground to 3.75" stroke, Lunati H-beam SBC 6" rods, custom JE pistons (8.2:1 compression, 0.020" overbore, 0.927" pin). I was designing it to have a better rod ratio than the 2.5, but more torque than the 2.2. The block is also o-ringed. I had all this done back around 2000/2001 or so. One day I'll put it together because I can't seem to sell the thing!