Need some help choosing a cam for my Blazer. Here are the specs as far as I can tell. 1968 396 BBC, stock 3993820 heads ...71-84...oval... OPEN... 454,402 Passenger and Trucks, 113cc chamber, 255/114 ports.Puts me at 9.14 compression ratio. Stock 91 454 TBI intake manifold and TB. Headers and dual 2.5 exhaust. The chip is tuned by AFI and I really don't want to have another one burned. My cam is worn out so I might as well replace it with something more fun. I would like 400+ft/lbs and usable RPM range of 1500-5000 Thanks for any help...this is my first BBC and I don't know much about them.