I heard a GT2 Cam for a 3800 today and it sounded great, the idle i love the lumpy / stutter sound..

It says that it would run ok with stock headers / pinrods

"The GT2 cam was designed for use with totally stock heads. Stock springs, keepers, retainer, lifters and pushrods can be used. Upgraded pushrods are recommended but not needed. RPMs past 6200 will require upgraded springs. Either 90 or 105# springs are recommended for high RPM use."

Since my rev limiter limits me @ 4000 in park i should be ok right?

And how much should i expect a shop to charge to put that baby in?