First time super six swap

I'm assuming you broke the two 5/16" bolts that hold the two manifolds together plus the linkage? If there is anything left of it to grab ahold of try some heat and some WD 40. Or else drill away.
Stick or auto? If its an auto, you DO have the right kickdown linkage, correct? Not much from the 1 barrel set up can be re-used, except the throttle cable.
http://www.slantsix.org/articles/supersix/article.htm