360 roller rockers

["Bruce Hevner" <scramblr@xxxxxxxxxxx>]

If you are using the older "non bridged" heads you WILL need to do some
machine work. This has been a problem with AMC heads for YEARS and I am
totally amazed no one has come out with a decent kit for this!. Depending on
what cam you are using you might need to machine the stud boss down to get
the rockers at the right height for proper geometry. Use shorter or longer
pushrods to get the geometry right and then cut the boss so that the rocker
is in the proper position on the stud.

 The late model heads are a different story entirely. They are already
tapped for 5/16 studs but have NO pushrod guides once you remove the OE
rockers. If it's a street motor and you are using a hyd cam with open spring
pressure of NO MORE than 350 lbs you can use small block ford studs and Olds
455 guide plates. You WILL have to machine the heads slightly (especially on
top of the Exh crossover). So the guide plates will fit correctly. I have
done several motors this way with no problems. If you are running a solid
cam with more than 350 open pressure you will need to enlarge the stud
mounting holes to 3/8 for bigger studs. THEN you will have a problem finding
guide plates.
 AMC roller rockers are the same as small block Ford. I have used them
interchangeably with no geometry problems. Some will argue with what I have
stated above. That's their prerogative. I'm just stating what HAS worked for
me. 
Bruce Hevner

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