So.. time to figure out what head for my 67 440HP. Basically stock rebuild and the car is going to be a driver not a track car. 480ish cam, 2355 pistons, holley SD intake, HP manifolds. I would like the stock straight spark plug configuration which makes me lean toward stealth heads but I have heard you should take your new stealth heads to a machine shop and have them go over everything. So basically your $1000 plus shipping stealth heads probably will cost you $1500 when you are done, yes? So would rebuilding my 1.74 valve 915HP heads with exhaust seats be cheaper and give the same performance? What would you do? Thanks.