Looking for information on upgrades for this motor. Want to keep TBI but is there aftermarket intakes? Is Vortecs heads a good idea? If so, can I still use the stock intake? Good Cam Choice? Is a 383 an upgrade? Anyone running a 383 TBi motor? Details? Just looking for a little more power since I am spending the money to re-do the motor anyway. Just rebuilt the 700R4. The Yukon has a 6-1/2" Dick Cepek Lift with 35" Swampers. Currently running 3:73 but they will be upgrades to 4:56's in the spring. Thanks for your help.