DACCO 762 Torque Converter bolt alignment problem Slant six

It only fits one way and there are 2 sizes 10 1/2", 11 1/2" so if you can get one bolt in the size is right but something is wrong. I take the flex plate off the crank, bolt it to the converter and paint one of the bolts, flex plate and converter so when I put it together I just line up the painted parts and it fits.