[Rotbody]

I would like the TSB where ford is using this spring in the 6.0's. I was thinking on doing the mod but would like some fact behind it than "it works". Thanks

 

[bismic]

There is no TSB on it that I know of (and I have pretty much all of them).

Just read the posts on it. That should be plenty of proof, although everyone is cautioned to get a fuel pressure reading before doing so ....

At least one post I remember, a guy that was thinking about the upgrade found out he had good enough pressure without the upgrade.

 

[NYC F-350]

Evidence of the fact that it works would be that International and Ford BOTH sell the parts. They are NOT aftermarket. You can bet that since Ford and International spent money to investigate the issue and design this update, that it works just fine.