I dont know either. He has good feedback and i contacted a couple of his customers who says good things. The heads are aluminum Pro Comps. Dont matter now any way since the motor is sold.
I guess my budget is about $4500 for right now. And i have to have 500HP w/ forged gear since i want to run a 200 shot of NOS. I think i will get a better deal if i go used rather than a brand new motor. There are all types of reasons why people sell their motors while they are still good.
I will just keep looking.