My neighbor has a 1999 Silverado with the 4.8. It has coolant in the oil. He has a line on a 5.3 from a 2004 Avalanche. Will that engine drop in with no issues?? The computer for the 4.8 shouldn't have any issues, as long as he uses all of the sensors from the 4.8, correct? Is there any difference with the reluctor wheel??