Thanks for all the info. When you use Van haisley's cam do you have to fly cut your pistons? and is there a wild cam out there you can run until you have to pull the whole motor down. I talked to Van haisley a few months ago and asked him what it cost to build me a 800 to 900 hp 12v He laughed and said send me the motor and 25k and we'll go from there. I'm guessing he was serious. I don't want to build the whole motor until I have to. So I guess I want to change things up to figure out what set up works good for me. then Build the whole thing right. Now keep in mind I drive my trucks in town the same way I would drive with a sled hooked. I have been told that if a product lasted me 50k miles it would last most people a life time. That is one reason I don't sell my trucks to people I know LOL