I'm tossing the idea of buying a 6.0 for my 05 silvy.... I was planning on cam and converter for my 5.3 but i want the 5.3 for my 99 blazer that has a blown 4.3. I'm sure you the rest is self explanatory!!! You see what i have done to my truck now.... what kind of performance gain am i looking at??? New nelson tune and nelson's cam package. What kind of RWHP numbers would i be looking at? Are there any more worthwhile upgrades i should do before it goes in??? Is there a certain year model i should look for? THANKS for any help!!!!