I have an 86 k5 with 103,000 miles on the 305. I got the motor runnin like a clock. I rebuilt the quadrajet and did a tune up and now it runs great. Now I would like to give it some help. What kinds of things have yall done to boost the power in yalls k5s and what products have worked well for yall. I want to add more power because I'm going to add 4 inches of lift and 33x12.50x15 tires w/ 4.56 gears. Thanks for the help.