I decided to use Canton studs all around (
https://www.cantonracingproducts.com...-PAN-STUD-KIT/), Milodon gaskets, Permatex Hi-tack to glue the gaskets to the windage tray, and Right Stuff between the upper gasket/block, and between the lower gasket pan. I already cleaned checked the flatness of the pan and tray on a piece of plate glass and made some minor adjustments with a body hammer, and cleaned everything carefully with acetone. The studs should be here tomorrow so I'll see how it goes.
I liked Rick's idea of using jet nuts, but I want to use a torque wrench and I don't think they give an accurate torque reading. The serrated nuts that come with the Canton kit should do a good job anyway. I also considered the Stage8 kit but those bolts are only 1/2" and I don't think they are long enough to engage the right amount of threads in the block.