Brian, the Revell Lamborghini (Diablo) is arguably one of the nicest attainable versions of the Diablo VT in kit form. Fit and finish is outstanding.....VERY nice. Stay away from the AMT Diablo......HORRIBLE. Just some advice.
On the Tamiya instructions above, it looks like the spindle that mounts the brake rotor is offset top to bottom slightly. If that is the case, you can also flip the spindles upside down and switch which side they are mounted on. Just a thought. I will have to check my stash tomorrow......I think I have the RE Amemiya RX7 race car kit from Aoshima down there.
I am guessing that we are dealing with a 3rd generation here Bill. On the chassis shot above you can see the "92-15 RX7" which would make it a '92 efini RX7 or a '93 RX7 for u.s. market. The '91 and down 2nd gens had a Macpherson type front suspension (like Bill explained above).
How about on the front just cutting the mounting pin off the spindle, drilling a hole in the spindle, and running a new peg for the wheel to mount on to. You can drill it at any height along the spindle cylinder to lower the front end without "monkeying" with the control arms.