im trying to install a 121 x 1.75 track on my 1996 indy sport. i have 3 questions.

is 1/4 inch clearance enough between track and tunnel?

can you get smaller drive wheels for it? i cant get the track over the drive wheels, because the drive lugs wont slide over the drive wheels.

my old track had 6 rows of drive lugs. the new track only has 4 rows. lugs on each side of the windows. none on the inside between the windows. are the drive wheels going to be spaced wrong? or do the one side of the drive wheels drive the track?

thanks for any help. mike