904 transmission / multi spring retainer etc.

Hi guys,

i´m doing a 904 together with my brother for his 69 dart. One common problem with 904´s is the spring in the clutch will unwind around 6000 rpm as far as i know, solution is the Multi spring retainer some vendors sell. I found a single spring at ATI, wound in the other direction, for much less money......but does it have the same positive effect?

http://www.atiracing.com/products/trans/904/

scroll down to bottom of page.....

Thanks for info!

Michael