Good Morning Everyone! 51, Jack, Andres, Ersatzs and TwoKids, thank you for the encouragement and suggestions.
The solid core door is an excellent solution, but keep in mind that I will need a total of 3, two of which need to be 8' long. Finding one for the gray bench is likely but the 8' length is going to make the others will be a challenge. The MDF material I am considering is rock solid and not the crumbly particle board that is widely available. It comes in 4x8 sheets and three sheets will cover two benches at 1 1/2" thick. A stainless top would likely be supported by this same material which makes me think that I can use it and later cover it with stainless. I've not decided for sure yet so I'll go by a couple of salvage yards to look at doors.
Ersatzs, the vise is over at my mother's house but I can see if it has a model number later this week. I did post it on the vises thread so we might find out there before I can check. As I recall, my father bought this back in the early to mid 1970's. I know that it was a big purchase for him and that he waited a long time to get it.
Jack, I must be nearing the end of this build because now I am starting to dream about 911 chips, PSS10's and RS ride height, short shift kits...the list goes on....
Here's how the interior looks now:
The windows and door will be trimmed out with Arts & Crafts style fir moldings stained to match. That will be one of my first projects once the benches are set up.
The electrician should add the outlets and lamps this week. I plan to use caged vapor style lamps on the two side walls and, as a temporary measure, two identical lamps above the windows. Eventually I will replace the latter set with hanging pendants but the ones I want are out of the budget, along with the stainless bench tops. This is what they will look like: