slant 6 to V-8 trans/bell housing adapter interest

I have the Wilcap one on my car ,and they use 700r4. they might have a bolt pattern for that transmission
I bought it from eBay the guy went with gear vendors instead. all I know is that the Wilcap needs tuning and had to make some adjustments and I made new adapter and still well it is what it is
and looking for a vibration , not saying its that but , it is what it is