New Coan Converter

For me, changing the convertor is an 8h job.

Drain tranny fluid
Unbolt the engine
pull the headers (you can't get to the bellhousing bolts without this step)
Pull radiator
Unhook all cables
Slide engine forward
Change convertor

reverse process
You forgot about having coolant drain all over you and your workspace when you pull the header bolts. That part of a big block is MESSY!!