Clutch fork return spring ?

I just installed a newer diaphragm style clutch and pressure plate in my 68 Roadrunner. I see that I need to remove the over center spring. What spring do I need that goes from clutch fork to bell housing so it pulls the pedal back up. I assume its a pretty tough spring. Would it be the same a stock spring since its a different clutch.

The stock fork return spring is retained when installing a diaphragm clutch. If you need one, Brewers Performance
sells them: www.brewersperformance.com

Just did this a month ago. The "stock" spring is sufficient to do the job. Its available from many suppliers but Brewers for sure.