thanks guys .
the pan is fully baffled with trapdoors etc . have not noticed this with other factory blocks . I have run this for nearly 10 years .
Doug , 8 qts in the sump . The 8-10 psi swing is way down track well after 1/2 track . Street oil pressure , done that with 3 different blocks and 2 different sets of heads , all the same drop at idle from cold to hot .
As to a windage tray . I did have one that I tried to get to work with this pan , ended up with more cut away than left .
I also would prefer not to use a Accusump , its a crutch .
Well I will try an extra quart on Saturday and go from there

Tex