Still digging, found this...
I emailed PBS Engineering about webster gears made for the fiero 4 speed manual transmissions. Here is the reply.
...........................................................................
Collin Westphal
PBS Eng. forwarded your request to us.
We have made a conversion for the 4 speed Fiero transaxles using straight cut spur gears with "Dog Clutch" engagement. These conversions are intended for Racing. Our design would not allow a 1st gear ratio much lower than 2.69 : 1. The other ratios are within the range we can produce. We no longer inventory these conversion kits, but will be happy to quote on a special order basis.
Thanks for your interest.
Mike Ruckman
Webster Gears Inc.
Ph: 415-388-1494
e-mail: webgears@aol.com
https://www.fiero.nl/forum/A...050410-2-056633.html