Torque converter/f,ex plat mounting bolts

MOunting the flex plate to the torque converter, I had ordered a bolt kit MOPAR (through Year one) and the bolts are way to big diameter to fit the flex plat to the converter. The torque converter has smaler diameter bolt holes which makes me wonder (1) DO I HAVE THE CORRECT CONVERTER OR (2) maybe MOPAR made a mistake and sent the wrong bolts or (3) does a 340 performance engine have a different converter than say a 318 and (4) while I'm at it I have a 72' 340 Duster change over year,with a forged crank. Does this require another torque converter (i.e. weights)