08-02-2004, 05:07 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Stock heads??
I didn't read all of the posts, but If these are stock 351W heads, then they are all the way down because they were designed that way.
Ford put adjustable rockers on the BOSS engines and very few others. If these are stock heads with stock rocker assemblies, they are to be all the way down.
Check a manual.
To make them adjustable, you would have to mill the bosses and tap for screw in studs. Since the studs on the 351W were something like 5/16 or 3/8, you would have to find that size stud. Then you would have to either bore the head for guide plates if you have the closed opening for push rods, or find plates that line up with the openings.
Then there is the rocker arms themselves. The stock ones will workf fine for many years provided you change oil and don't over rev. the mill. However, you may want to install roller rockers and get a little extra out of the engine.
Just my $0.02
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