[RacerX13]

I am about to convert my 302 hydraulic non roller motor, over to the factory style Hydraulic roller. I will be using the factory retainers and factory roller lifters. I already know where i need to drill and tap the holes at for the Spider. What i am wanting to know is do i use a retro fit hydraulic roller cam or just buy a after market 5.0 roller cam. an what about push rods can i use my old push rods or do i need ones out of a 5.0? Is there a diffrance? Please help