I know I may be opening a can of worms but from the last post I read 450 rwhp (500+ crank hp) was considered beyond the safe limits of a 5.0/302 roller block. For a street/strip car with a turbo or supercharger shifted at 5800-6000 rpm, what are the safe limits of the 5.0 block? 450 crank hp? 375 crank hp? Apparently 500 is over the safe limit.