Installation (continued) Ever since we received and flow tested the Edelbrock Performer
RPM 460 heads we were awaiting the moment of slipping these
jewels over the studs and onto our rescued and reconditioned
460 bottom end. Finally, it was time.
We replaced the old cylinder head locators with new ones.
Next, we installed ARP head studs finger tight after applying
the included lubricant. In part one we ran a tap through
the bolt holes to remove any debris which might have prevented
the studs from reaching bottom.
We carefully slid the RPM heads over the studs.
To prepare for torqueing down the heads, we applied the
inlcuded ARP lubricant to the tops on the studs.
Referencing our shop manual for the torque sequence and
following the torque specification included wih the ARP
studs we torqued the nuts to 90lbs and then to 140lbs.
Eager to confirm fit, we set the intake gaskets in place
and fixed them with the use of a spray adhesive.
With the use of the included
Comp Cams assembly lube we installed the
hydraulic lifters.
Things started coming together fast at this point. We
installed Trick Flow 3/8" hardened pushrods. We used
the stock 8.550" length. We were sure to pre-oil
the lifter seat and confirmed that the pushrods were properly
resting in the seats.
Once all the pushrods were in and pre-oiled we cranked
the motor over until we just saw the exhaust pushrod of
a cylinder (No. 5 in our case) begin to move upward to
open the valve. This ensured the intake lifter of cylinder
No. 5 was on the base circle and ready to be adjusted.
Using assembly lube we set a rocker
arm ball into one of the Comp Cams Magnum rockers. Comp
includes tapered nuts with the rockers, but we had a set
of ARP Polylocks left over from a previous 351C build
that didn't clear our Crower rockers.
We made sure to back the set
screw almost all the way out of the polylock. By lightly
turning the pushrod we then tightened the main body
down until we just felt a slight resistance. At this
point we gave the Polylock on half turn and then tightened
the set screw.
We repeated the process for all
the intake valves. The same process was
performed to adjust the exhaust valves. Only to adjust
the exhaust valve you must make sure the intake lifter
is on the cam's base circle. To do this we rotated the
motor until the corresponding intake valve reached maximum
lift and then came down about 1/2 way towards closing.
At this point the exhaust valve was ready to be adjusted.
Edelbrock
Performer RPM 460 Aluminum Cylinder Head
The 95cc combustion chamber and 292cc intake
runner of Edelbrock's Part No. 60669 would provide the compression
ratio and port velocity were were after. For more information
about this head including flow data conducted by FordMuscle,
please see the article HeadRush:
Flow Testing and Design Strategy of Edelbrock's Perfomer RPM
460 Head.
Source:
Edelbrock Corporation 2700
California Street
Torrance, CA 90503 www.edelbrock.com
We replaced the old cylinder head locators with new ones.
Next, we installed ARP head studs finger tight after applying
the included lubricant. In part one we ran a tap through
the bolt holes to remove any debris which might have prevented
the studs from reaching bottom.
We carefully slid the RPM heads over the studs.
To prepare for torqueing down the heads, we applied the
inlcuded ARP lubricant to the tops on the studs.
Referencing our shop manual for the torque sequence and
following the torque specification included wih the ARP
studs we torqued the nuts to 90lbs and then to 140lbs.
Eager to confirm fit, we set the intake gaskets in place
and fixed them with the use of a spray adhesive. 
Things started coming together fast at this point. We
installed Trick Flow 3/8" hardened pushrods. We used
the stock 8.550" length. We were sure to pre-oil
the lifter seat and confirmed that the pushrods were properly
resting in the seats.
Once all the pushrods were in and pre-oiled we cranked
the motor over until we just saw the exhaust pushrod of
a cylinder (No. 5 in our case) begin to move upward to
open the valve. This ensured the intake lifter of cylinder
No. 5 was on the base circle and ready to be adjusted.
Edelbrock
Performer RPM 460 Aluminum Cylinder Head
