Put mine in on Saturday, took about an hour. No problems with the bolts but was warned in advance about the striping problem. Also gave me a chance to remove some carbon build up in the throttel body, dog house and intake (170k on engine). Take a good look down into the intake also, you will be able to see where some porting of the heads will be needed. Took her out to the track on Sunday. No knock with 18 PSI of boost and Sunoco 94. Ran 13.3 at 99 mph, once I learn to actually launch I should be into the 12's easy. R/T .9's to 1.09's.