When you look at an automatic transmission the torque converter is the large drum sitting in the bellhousing. It bolts to the flexplate which in turn is bolted to the end of the crankshaft.
The other end of the torque converter is splined onto two shafts (one rotates inside the other shaft). The torque converter is free to move along the shafts as the internals of an auto actually expand and contract when operating.
The two shafts the torque converter is fitted to, are mounted in a pump assembly which generates the hydraulic pressure required to make the whole thing work.
The pump is bolted into the front of the transmission case by a series of bolts. These bolts are quite often used to mount a different bellhousing to the transmission case. Normally the standard bellhousing bolts into dedicated tapped holes but using the pump bolts is a common "Hot rodding" method of fitting the transmission to another engine.
I hope to take photos tonight of the modified bellhouing beside a standard one. Then I can return Judd's bellhousing to him.