There are several threads on here about foot box modifications. Just do a search and you should find all the info you need. Great avatar!

 

There are several who have built a bump out on the engine side next to the accelerator pedal for more foot room. They cut a hole, built a shallow box and riveted it to the engine side. Like it was mentioned do a search for footbox modifications.

I went a little more radical and moved the entire side panel, on the engine side toward the engine, until it hit the 3/4" brace. That changed both the front and top panel. I've got a Ford 302 engine using Ford Racing shorty headers which allow you to move it quite far toward the engine. Remember, these cars are built to accommodate the modular engines which are much wider. What engine are you planning?

In addition, I flattened out the bend that touches just below your right knee. I spent a lot of time moving that piece of metal out, marking, trimming, putting it back in and marking it and removing it........; I can't tell you how many hours I've got in that one piece of metal but it's a lot. I started a thread outlining my passenger footbox and plan to add to it soon as I finish my drivers footbox which should be later this week. I will try to remember to post a link here.
http://www.ffcars.com/forums/showthread.php?t=269344&highlight=passenger+footbox

The box added on the side is the easiest and can be done with the modular engines. I had a mocked up engine in place as I worked on that panel.

George

 

One of the vendors, FFMetal, used to offer a kit that restored the footbox dimensions to pre-modular size. I used it in my Mk.III. I didn't see it on the site, perhaps it's no longer available, or doesn't work on a Mk.IV.
Maybe you could contact them and find out.

 

Thanks Guys, I don't have my engine yet so I didn't know how much room I'd have to work with. I'm using a 302 with the FFR (BBK) headers

 

I pushed the engine side to the 3/4" tube and made a fill-in piece to bridge the gap. Extended the clutch side panel with a tapered extension and foot rest. Lots of room now. Mine's a 3.1 roadster. Jim

 

Here's pics of the plate I bolted to the extended panel. Pretty simple. Jim

 

SRider,

Here are some pictures of my engine side panel.

I moved the very front corner to the right 1/2” and tied the corner together with 1-1/2” angled aluminum.

Just as Jim did, I used the same 1-1/2” aluminum angle to connect the side panel to the 4” tube. This will also help seal along that bottom edge. If you look in the very center of the picture, where an angle is cut out of the angled aluminum, you can see where the tab, in the floorboard, was bent flat. Looks like I gained almost an inch there. That is the bend, in the side panel, that touches your leg just below the knee.

This was actually taken before I put in the angled piece to hold the side panel but you can see how much room you will have.

This picture gives you an idea of how much room can be gained by moving the side panel. The wood represents where the panel was originally. Notice about 1/4 of the way in from the right, along the bottom edge of the picture, the tab on the floor panel that was bent flat. When finished I was able to gain a little more space than shown here. You’ve got to be careful with this 6061 aluminum because it can split easily with too much bending/unbending.

Here are some other good ideas:

http://www.ffcars.com/forums/showthread.php?t=251636

http://www.ffcars.com/forums/showthread.php?t=254851&highlight=footbox

http://www.ffcars.com/forums/showthread.php?t=267064&highlight=modified+footbox

George