Custom drop trunk mod nearly complete
This update covers drop trunk mod.
Related notes live on the Factory Five Cobra build hub.
drop trunk mod: Why I chased trunk space
Boyd tank and storage
First, one early change was the Boyd Welding gas tank.
Also, it is a work of art.
Besides that, it holds more than 25 gallons of gas.
However, that capacity is a bit overkill in this car.
Still, this whole project has turned into overkill 🙂
Next, many builders run a drop trunk mod.
Because a stock Mustang tank leaves more trunk room.
My friend Russ Thompson makes this mod.
Therefore, I highly recommend it for a stock tank setup!
Here are a few pics to show the difference!
From the photos above, you can clearly see the space gain!!
However, with my Boyd tank I only have two inches of clearance.
In other words, space is still a premium here!
Also, I relocated the battery to the engine bay.
Then I used the Breeze battery box for that move.
Building my rectangular drop box
CAD and fab
Ok, back to my setup.
First, I measured a funky shape to keep the 3/4 inch rails.
However, after many discussions, those rails only square the jig.
So I cut them and made a rectangular box.
Then I used a free CAD tool called https://www.emachineshop.com/.
Also, I developed this drop-in box there.
Still, I left part of the 3/4 inch rails intact.
Because that adds a little edge support.
So far it has worked out well!
Next, a local shop fabbed the box for only $60.
Also, he spot welded the corners.
Then he soldered them for a great seal.
After that, I sprayed paint on the corners.
Because I want to limit corrosion at the solder.
Meanwhile, it is not pretty now.
Ultimately, carpet will hide it soon.
Service access left
Still, I have a little more work to do.
Also, the drop is pretty small at only .38 cu ft.
However, I will take it!
Next, I will rivet a panel over the fuel sender.
Then a hinge will create a service door.
As a result, I can reach the fuel pump and return line.
Ultimately, only drilling and riveting remain for this drop trunk mod!
