The definitive LS/VTEC guide.
Building the LS-VTEC Honda Civic Engine - Tech - Sport Compact Car Magazine
By the way, you won't get a GSR engine without starting with a GSR engine. The B18C block has an oil cooler, a crank girdle, and is hand built. The B18B is none of those. You will get VTEC, but it's fair to mention that before hand. The swap itslf is pretty easy, but there are a few machining complications involved. It's all explained there ^^^^.