Will the Comp Cams or Crane retro fit roller cams work in a 1985 318 block that came with a factory roller cam without block modifications. In other words are they a direct fit. I understand that older LA blocks require block oiling modifacations to make rollers work. Thanks in advance

2005 Dakota 4X4 3.7 2004 Rumble Bee 5.7 1978 Diplomat 318 1969 Satellite 318 "bracket racer" 1966 Barracuda (in progress ) 1964 Dodge 330 (future race project) 1962 Belvedere (HUM????)