It's one of the MP high compression short blocks, hyperexplosive piston, .011 out of the hole with small chamber W5's milled .050. Right at 12.7:1 compression. Hughes solid flat tappet with 1.6 rockers nets out to .650 lift. It's been together for 10 years now and is pretty tired. I'm going to freshen the heads, install the 2.08 valve and build a stroker short block with good pistons and rods. That should put the car solidly in the mid 9's.