I need the truth about wheel adaptors

I am leaning toward the cragar SS or the old style keystone touque thrust, they are very similar to the ones tool man sent. I have seen the ones from Summit but I don't think they sell 15X8 in a 3 1/2" back space for SBP.

I have a 67 Dart. I purchased the SBP 15 x 8 SS wheels from summit and they did not fit
I sold them and went with the SBP 15 x 7 SS with 255/60. Fit perfect, no lip rolling needed with 83/4