just a quick question,i am building up a older 13b carby type motor that used to run a 4spd gear box but i want to put it in my series four rx7 n bolt it up to my series four auto box,so my question is,if i bolt my flex plate off my motor up to my new carb type motor will it bolt straight up to my auto tranny or are the bell housing bolt pattern different from the older motors to the new ones?thanks

 

bellhousing bolt pattern is the same from 74 to now...