You can save alot of money if you just look for good used stuff. If you are really wanting to not loose much on bottom end Id probably look for a used tr220 on a 112 for about $200. You can find used hardened pushrods for around $75 and then just get the patriot valve springs new. I found my cam brand new in the box but someone bought it years ago and never installed it. Got it for $250. Just got to look around. Check ls1 tech classifieds too.
99 silverado 2500 4x4 ec lb, lq4 with 243 heads, pace setter long tubes, true duals with x pipe and bullet mufflers, comp 222 224 112 cam, 8.1 truck injectors, 4l80e with 2800 stall, 373 gears, 285 75 16 tires, efi live tune in progress, 350rwhp 360tq, 11.8 average mpg mixed driving