2011 - Crane Cams

VALVE TRAIN
Rocker Arm Stud Conversion Kits
Rocker Arm Conversion Stud Kits for Big-Block Chevy Gen V & VI V-8, 454-502 cu.in. and 8.1 Litre V-8
Converts Non-Adjustable Chevrolet Gen V
& VI 454-502 and 8.1L V-8 Engines to
Adjustable Rocker Arms
Chevrolet’s 1991-00 Gen V and VI, 454-502
and 01-08 8.1 litre big-block V-8 engines
offer great performance potential but are
handicapped by their non-adjustable, selfaligning
rocker arms and valve train. In stock
form this system works great, but for performance
applications or any instance where
an aftermarket camshaft and valve train are
called for, the answer is “no way”!
Now Crane Cams offers an ingenious, simple,
easy and low-cost way to convert these nonadjustable
valve train engines to the obvious
performance advantages of high
strength, screw-in rocker studs, pushrod
guideplates, and die-formed steel rockers or
roller fulcrum, aluminum rocker arms.
These are unique rocker arm studs that
replace the stock studs without retapping,
machining or removal of the cylinder heads.
For the Gen V and VI, rocker arm stud kit 99152-16 is made
with a 3/8” diameter bottom thread that bolts directly into
the stock rocker bolt location. On top is a 7/16” threaded
stud end that allows you to install any adjustable Chevy
big-block rocker directly onto the stud. Factory pushrod
guideplates must be used to correctly align the pushrods.
You can use part no. 13634-16 heat treated pushrods or
3/8” diameter stock pushrods from any big-block Chevy V-8
equipped with adjustable rockers.
The Crane 99152-16 “big-and-small” studs are not recommended
for use in competition applications, or with valve
spring open pressures over 480 lbs. For those applications
use 99157-16 7/16” x 7/16” studs (you must drill and re-tap
new threads in the heads) and 13650-1 guideplates.
For the 2001-08 8.1 litre engines, rocker arm stud kit 99155-16 incorporates a 10mm-1.5 bottom thread that bolts into the
stock rocker stand location. The 7/16”-20 top thread again allows you to use any adjustable Chevy big-block rocker. Our
26640-16 Pro Series one piece heavy wall heat treated pushrods are recommended for proper valve train geometry.
Application Part No.
Chevrolet V-8 91-00, 454 and 502 Gen V and Gen VI Engines 99152-16
Chevrolet V-8 01-08, 8.1 Litre Engines 99155-16
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