To finish the undercarriage, the four rear shock absorbers, muffler and exhaust pipe assembly, and rear suspension support were added. A drill bit and pin vise were used to open the end of the exhaust pipe.
The front plate had six ejector pin marks. These were sanded out even though I later realized that the aftermarket interior plate would cover them. The two tow clevis attachments were added to the front plate and then the assembly was joined to the front of the hull. There were no issues with the fit.
The rear hull plate has two holes which must be opened if you wish to attach a first aid case in a later step. I left them closed. The two tow clevis attachments and tow pintle plate were added to the rear hull plate and the assembly was then attached to the rear of the hull, again with no fit issues.
After a final clean-up and check of the work to-date, it'll be time to tackle the interior--lots of added detail for that area! Here's a photo of the left side showing the work up to this point: