Kmember/mtr mount Q

I went ahead & got both pairs of insulators (they were cheap enough china items) & the interlock one for the drivers side so I will mockup soon & go from there. thanks Professor.
I tried to install mtr/trans with the thick mount & the interlock mount & the bottom studs are too far off from the oblong mount hole(s) in the Kmember. Am I doing something wrong or do I need to go with the shorter 64 273 black biscuits?