I have a question about what intake is the right one for the 390 4V motor? There are S code intakes or regular intakes, Not sure what would have come on my car originally? It has C8AE-H heads date code 9C19, Block is WI date code 9C10, Trans is 4speed Top loader C8AR 7006-D W2 TUG M3, Got any clues? Dearborn MI, Body, Motor & Trans have Vin stamped and they all match. Marti Report only says 390 4V Motor.