so i just swapped my 2004 gmc yukon with a engine out of a 03 tahoe. runs greats only thing i noticed is its got crazy high oil pressure if i go wide open it will peg the oil pressure gauge. running down the road it does 60 psi all day long. i bought this engine used off facebook was told its stock. looked stock. so anyone seen thing before. did i get something? bad or a gem any help is appreciated the engine is the 5.3 flex fuel engine forgot to mention that