I got this from another web site. I will not refer you there as it lights up my virus protection software. It is by Rich Wagner
Steering Wheel Modification (smaller diameter)
" In my continuing efforts to fit a large body into a very small car, I offer the following modification to the steering wheel.
Remove steering wheel. My hub wouldn't come off so I just removed the spoke attachment bolts.
Carefully remove original rubber grip material - a single edge razor blade works well.
Cut spokes off flush with rim.
Cut out section of rim to desired size. eg. to go from standard 15 to 13", cut 2 x pi or 6.3" from the rim.
Now the fun part. Reshape rim to new diameter trying to keep it as round as possible.
Shorten spokes by about one inch.
Clamp together and weld rim and spokes.
Refit grip material using 3M weather strip adhesive.
I also added a foam wheel cover to keep everything together. Advantages: cost no adapter to move the wheel even closer to your chest horn still works (well, as good as it ever did...) Next project: Modify seat backs on later cars to gain some more valuable real estate for long legs (mine is a 74 midget and the seat back cushion looks much thicker than it needs to be)"
Rich Wagner
Paul