Must have been completed by a PO as the only pre-drilled holes were for the top mounting bracket. There is a hole that could be mistaken for a steering column exit hole, but it is not.
Francois - no real need to take measurements. I started my conversion like you, a bit worried, but it all falls into plce quite easily.
What chassis do you have? If a Spyder, dead easy as they supply a rack ready made and even tell you which holes to use on the chassis! I cannot comment on what is used on an original chassis. Once fitted, you will need to cut an aperture fore the column and a hole above for the column and handbrake cable - see the RH side for size and position. The aperture is pretty crude as it allows for column final assembly and finished with the plate over the top. You will need to glass in the aperture you have left on the RH side.
Do you have a LH mounting plate? I think hard to get them, but easy to make. Now temporarily fit the new dashboard. This will show you where the column needs to be positioned. Important you get it right! If you have the correct mounts, then the column should line up nicely with the pre drilled four holes at top and two lower down.
Now, here is the important bit: the alternator will be in the way! A new mount is needed that will raise the alternator enough to allow the column to fit under.
Once all this is done, then mount the pedal box - use the one you already have. I am using an XR3i steering column, so it was fiddly to find the right position for the box, but I started by cutting a small aperture above the column roughtly where the box will connect with the body, and with some careful measurements, found the best position, widened the aperture and drilled for the mounting holes. Note the pedal stems need to be bent a few inches above the actual pedal to allow a comfortable fit. Also note that the glass is a bit bendy down there, so give some time to make a couple of strengtheners fore and aft from the pedal box search the archives for lots on this.
Now it is just move the servo, mount the handbrake and extend the brake lines and column wiring. Final fit of the dash and bingo, you can overtake with prowess if not speed!
I am still working on the best place to mount the wiper motor. And the opening left from removal of the pedal box is pretty awful that needs to be glassed over.
viewtopic.php?t=13635&p=62016Hope it goes well.