Flexplate trouble

I am neck deep in my I6 to 5.0 swap. I have a 91 roller mated to a 1980 granada C4. The flexplate I need is a 50 oz 164 tooth. My machinist at Napa sold me a pioneer FRA 214. Looked pretty close, but the converter bolts hit the spacer plate and the flexplate balance weight hits the spacer as well. It looks as if the new flex has 1/16 less dish than the stock 28 oz. Anyone have a part number for me?
Thanks!