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Personally, i dont see a 59 degree head(except the latest and best indy head)making an honest 700 ponies, based on the old "riders dyno" benchmark.

I know w5's wont do it, w2 wont, the b1ba and eddies wont, so that leaves some sort of 245 indy head as the only way of getting there

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I believe our dyno to be "accurate". My engine made 560HP and runs 10.50's in 2500d.a. air in my 3320lb. duster with me in it.
MPH is usually 125-126.
To me, that's pretty accurate "comparing" other engines I dyno vs. customers cars.
Most combo's that don't "perform" as they dyno suggests are most likely lacking in the chassis and 60ft. over the dyno.

My car has gone 1.37-1.3960ft. Usual is 1.41.
I'm sure that when our dyno reads close to 700HP, it's accurate. I can't speak for anyone else's dyno but knowing what your dyno #'s read vs. in car performance vs. the chassis combo is KEY to getting the car to do whatever the customer wants it to do.
Indy heads flow well, and I find it hard to believe that you think 700HP is unattainable by them in all but the biggest port they offer!
But your allowed to "think" whatever you want...