HOW MUCH POWER IS A CHEAP, LOWBUCK, JUNKYARD 4.8L LS CAM SWAP WORTH? CAN YOU REALLY SWAP CAMS WITH THE STOCK SPRINGS? WILL THE BTR TRUCK NORRIS NSR CAM WORK WITH STOCK TRUCK SPRINGS? HOW MUCH POWER DOES A JUNKYARD LS MAKE WITH A CAM SWAP? CHECK OUT THIS VIDEO WHERE I RAN A JUNKYARD 4.8L LR4 WITH A STOCK CAM THEN WITH A TRUCK NORRIS NSR (NO SPRINGS REQUIRED) CAM TO SEE IF THE CAM WILL WORK WITH THE STOCK, WELLWORN (LOWLIFT) VALVE SPRINGS. CHECK OUT THE POWER GAINS.