I put a set on my Shelby 4 weeks ago and contrary to most postings here and in other FE forums I found the quality of the finish and valve job of very good quality. So much that I only did a minor bowl clean up and installed them as is.
I used ARP Head bolts and stock rocker assy bolts, just replacing the 2 extra long ones with standard lenght ones. Making sure none bottoms out. (helps having some extra FE parts arround)
I have driven it 800 miles since and had zero problems so far. The only thing I really did not notice was a substantial power increase.
It sounds a little different and revs a little higher but thats about it.
Fun as always, just donīt have to carry the lead supplement anymore.
