Yes, the bolts that go around the bell housing are 3/8" and go from the trans side into the block...
There are two 7/16" bolts that go on the bottom of the block just above the starter on the driver's side and one opposite it on the passenger side that go from the block side and thread into the transmission...
Dis you chase the threads in the block with a tap, and then chase the threads on the bolt with a die??? If you didn't there could be some dirt/debris in the threads that can fight you while installing them... Having clean threads makes things go together much easier... Dirt and debris on the threads can make them jam/stick when you try to assemble them...
