Cab, are you using that .040 restriction on your street motors? I believe my small block is filling the valve covers on WOT runs and leaking out the breathers. I have erson needle bearing rockers and a grooved cam so it oils ALOT all the time. I have been considering restricting the oil some to see if it helps the bleeding breathers, it has good baffles already.

I was considering external drains but my block is tubed so the lifters oil off of the drain back.