Does anyone know where I can get flowbench #s for a set of stock 993 heads. They are 1.94/1.50, 76cc. I've been looking for a while now, and can't come up with any answers. Thanks Kevin

Kevin,
The problem with flow bench numbers is that there are not two that are alike. The numbers that you come up with on your flow bench will most likely be somewhat different than your neighbor down the street will get on his bench.
A flow bench is an excellent tool for comparing heads and for checking flow before and after making modifications to heads, intake manifolds, carburetors, etc. Whenever you see flow numbers published for a particular part, remember that this is an estimate, at best.
Even the runner volume figures that you see advertised are not a true indicator of a particular head's performance capabilities. The flow, regardless of port volume is affected by bowl shape, seat design, "short radius" shape (especially on the intakes), valve shape and design, combustion chamber shrouding (or the lack thereof), proximity of the valve curtain to the cylinder wall, etc, etc, etc.