dang - welded in 3/16 spacer ring on wheels and still the brakes pulsate

THAnks guys - this is the front wheels. if i put the stock rims on there, there is no brake pulsation. i just rechecked the whole spacer setup and i actually have a bit MORE clearance with my welded back plates. here is a pic of the rear wheels with some plates welded on that i used for reference. i am not uber sure about how drum brakes work but there is not wheel weight or anything on the OUTSIDE of the hub that seems to be hitting the rim. ugh this is a PITA!!