Heads are OOTB Trick Flow 240. Bottom end is nothing special, just a generic 4.250 stroker kit with dished pistons. Compression is too high for much boost so we're setting it up with 15% underdrive on the blower. Don't want the customer to blow it apart the first time he puts his foot in it. Customer is building some kind of Pro Street car. I don't know which make or model. I think he has a rack and pinion front conversion which is why he went with the dragster oil pan.