1) Lifters. (that's rather obvious)
2) Adjustable valve train. (to facilitate adjusting the valve lash)
I'm guessing your current rockers are "pedestal mount-positive stop" type. (Torque the stud nut on all the way. No adjustability.)
You'd need to get some self locking nuts. Like these
, or these
, or this
kit if you have 5/16" studs.
I'm also guessing, your rockers are the "rail type". (They have “ears” on the valve tip end of the rocker where it contacts the valve.)
Not recommended for hi-po use.
However, they could
work with the adjustable nuts, if you had
to do it that way.
3) Valves will need to be changed.
You need the type that have a .250 hardened "tip" on the valve stem.
If you use the stock valves, with solid lifters, the rocker arm will hammer the tip, and........boom! [img]images/graemlins/shocked.gif[/img]
Unfortunately, it's not a quick and easy swap from a hydraulic to solid cam.
The best way by far IMHO, is to mill the stud bosses, and install 3/8" studs and guideplates.
Get the newer style (non rail type) rockers, or better yet, especially with a solid cam, rollers.
will also be required, if using guide plates.
Here's some related reading.
Ford technical information.
Ford technical information. (go to pages 62-65) - (takes a bit to load [img]images/graemlins/crazy.gif[/img])