Repost from old forum:

Major changes are of course the motor swap. This change ALONE made a world of difference. Next was scrapping the spring. I use shrink tubing here. It is such a small amount that this works very well in my eyes. This smoothed it out more, reducing any vibration. Finally sanded the wheels and tires. Used the tire machine, and turned down the fronts until we had an ideal tripod. Left the tires stock for now, they hook up pretty good on our rubbered down track when clean.
Next a little body work to lower it just a tad. But toning this car down with a motor that is more classic in overall feel was step one.
Fun night!
Remember, I'm not racing on a commercial track. We like our classics at more scale speeds and try to keep the scale appearance when we can.
THEN a second approach

Chassis trimmed in all the right places. I changed to the SL-1 and used the tubing MT has as the shaft. Pinion presses right on.
