Good day every one. I've got a '97 Suburban with a 5.7L 350 Vortec. Last year the engine blew and I had to replace it. What I did was take a standard 350 block and applied the Vortec heads and intake. The problems I ran into were a treat! LOL. But what I need to know is the duration and specs of the roller cam that was in the original vortec so I can find a hydro cam of the same stature. My boss didn't tell me that he put a Blue Racer cam in the block he gave me. So the truck runs rough and eats gas and has go balls. LOL. Thank you in advance folks!!!