Want smoke switch

scott3106

New member
Joined
Sep 9, 2012
Messages
7
Just kidding but i do have a question about valve springs i am fixing to install arp 2000s and 90hp nozzles i am wanting stock 475 compounds but will be awhile when do you need heavy springs
 
[ame="http://www.youtube.com/watch?v=w3ZoHhvQgjU&feature=youtube_gdata_player"]up and atom - YouTube[/ame]
 
I have DDP 90's, and a 351/475, been holding stock springs for over 50k miles, 60+ PSI.
 
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