You will be much further ahead by concentrating less on what giuy over on this that board is doing or BSing about and work on your own car. There is lots of BS on the boards Especially when it comes to dynos and HP. NO buddy makes 1000 HP with 882 heads. What is it 60psi of boost? and 3 bottle of nitrous oxide?
All you will do is create boost (back pressure) as the air cannot get in or out of the motor with 882 heads on it.
They flow like **** even when fully ported. 100hp less than a camel back or stock vortec or simple entry level perf head on a simple N/A street motor. Give your head a shake. All the blower boost in the world won;t fix a bad cylinder head.