... this seems to be quite a confusing matter even for specialists... from all things I have gathered about auto transmissions, incl. Chrysler FSM for the Wrangler, the "bolting pattern" refers to the bolts attaching the converter to the "driveplate". Converter simply "slips" into the pump-gear hub but is bolted to the driveplate. I guess the "pattern" is to prevent incorrect centering or assembly?
Apparently some use the word "flexplate" in lieu of "driveplate" too...
I guess I'm better off ordering a converter-and-flexplate-combo to avoid the issue lol
thanks all for your help