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Earle Holt · 05-17-2010, 09:10 PM

Yes Rory, the 911's don't need clearancing and I've run them without any issues up to 6500. The 999's are a bigger, stiffer spring, but require rocker work for clearance.

05-17-2010, 09:10 PM	#4
Earle Holt Member Join Date: Nov 2001 Posts: 194 Likes: 1 Liked 4 Times in 1 Post	Re: 5.0L SB Ford valve springs Yes Rory, the 911's don't need clearancing and I've run them without any issues up to 6500. The 999's are a bigger, stiffer spring, but require rocker work for clearance. __________________ Earle Holt 1055 Stock