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my point is you add those kinds of parts to a typical build I'd bet + - 100hp

is that 345cfm # that was thrown out anywhere near accurate??
If so 800hp should be within range. It is apples to orange comparison because BBC heads are superior by design. My 555ci has cnc 355 heads and is close to 1000hp. Obviously much larger ci then any w5.

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Flow benches are like the dyno's we were talking about.

My old heads( that i am aware of) were on two different benches, one they peaked at 297 if i recall, the other in the 330's. I know of another set of w5 heads that are extremely well done( as good, if not a hair better than the ones i ran) that barely got over 300 on a third and different bench again. So, who knows, two sets of well done w5 heads on 3 different benches went a little over 300, a little under 300, and in the 330's as i recall. At the end of the day we end up back at weight, MPH, and ET at the dragstrip.

If i had a pair of heads that went 370 and produced 10 teens in the 1/4 mile, and another pair that went 9.80's on top of the same motor, and went 297, i am thinking the heads that went 297 must be better than the pooches that went 10 teens


On that note i am going home, we had our first ever 4 car day at the store, and i am thinkin Jack and Coke and the couch