The gasket & tray sandwich seems like a design that requires more skill than average to seal properly.
Do you really think your not as good as mechanic, hot rodder, than your average UAW union worker?
AKA aside, if the factory can assemble the motors with the windage trays and make sure they don't leak you can too
I use a silicone sealer that is marked "adhesive sealant" on the tube to prevent leaks between the block, oil pan, windage tray and gaskets
Don't gob it on
I use a very thin skim layer between each part and put the bolts in right away and tighten them down enough to not squish the gaskets out between the block, oil pan and windage tray and let it dry long enough to set before adding oil and running the motor
Let us know what you do and the results
