The quickest way to turn a 12.00 street car into an 11.50 index racer is a small N20 plate system.

My Belvedere's best pass N/A is 12.43-109, runs 11.50-120 on the spray.
We have two different promoters who do an 11.50 class, and it's been a blast.


Fin angle on a J converter wouldn't allow for any gains if you switched to a low gear set.