SBC Torque specs:

Size                USE                                    TORQUE                    Lubricant

1/4 - 20          Oil pump cover                      80 lb. in.                (oil, unless noted)
                       Oil pan to front cover             80 lb. in.
                       Front cover                             75 lb. in.
                       Rocker cover                          25 lb. in.               antiseize
 

5/16 - 18       Oil Pan bolt                            165 lb. in.
                      Camshaft Sprocket                 20 lb. ft.
 
 

3/8 - 16         Intake manifold                        25 lb. ft.
                      Water Outlet                             20 lb. ft.
                      Exhaust manifold                     25 lb. ft.                 antiseize
                      Clutch pressure plate              35 lb. ft.
                      Distributor clamp                     20 lb. ft.
                      Flywheel housing                     30 lb. ft.
                      Flywheel                                   60 lb. ft.                 Locktite
                      Water pump                             30 lb. ft.                 Sealant

3/8 - 24        Rod bolts                                  50 lb. ft.                  Locktite     (0.006" stretch, frequently 55-60 lb. ft. required to obtaim proper stretch)
11/32           early rod bolts                           35 lb. ft                   Locktite     (0.005" stretch)

7/16 - 14     Head bolts                                65 lb. ft.                   Sealant
                    Rocker arm STUD                   50 lb. ft.
                    Oil pump                                    65 lb. ft.

1/2 - 13       Main bearing (inner)                70 lb. ft.
                                            (outter)               65 lb. ft.

1/2 - 20       Harmonic balancer                  85 lb. ft.

                  Oil filter canister                         25 lb. ft.
                  Oil drain plug                              20 lb. ft.

1/2 - 14     Temp sender unit                      20 lb. ft.

14mm       Spark plugs (13/16 hex)           25 lb. ft.
                                        ( 5/8 hex)              15 lb. ft.
 
 

Head bolt sorque sequence

The use of studs offers greater clamping force and also requires a torque sequence (and lubricant) as recommended by the manufacturer. ARP is adamant about using a special moly lube or ARP thread sealer for use with their stud packages.  ALWAYS follow the manufacturers instructions for best results.

Here are a few scans of instructions from Edelbrock that seems to be very usefull.

Aluminum (aftermarket) heads and intake manifolds require a different torque than stock cast iron units.

 
 

Common assembly clearances

(ALWAYS consult your piston manufacturer for recommended clearances. Many pistons require a tighter bore)

Piston to bore                                             0.0055 - 0.0065" ( measured at centerline of wrist pin, perpendicular to pin)
 

Piston ring gap                                            MINIMUM end clearances        Top        0.022"
                                                                                                                           2nd        0.016"
                                                                                                                           Oil          0.016"

Wrist pin                                                        0.0006  - 0.0008" in piston, 0.0008 - 0.0010" in rod for full floating pin (End play 0.0 - 0.005"

Rod bearings                                               0.002 - 0.025" , side clearance 0.010 - 0.020"

Main bearings                                             0.002 - 0.003" , 0.005 - 0.007 crankshaft end play

Piston to head clearance                           0.035 MINIMUM  including gasket (steel rods), 0.060" MINIMUM aluminum rods

Valve to piston clearance                          MINIMUM 0.020" exhaust , 0.010" intake NO VALVE FLOAT
                                                                      Recommended: 0.080 intake, 0.100 Exhaust (steel rods) 0.100 intake, 0.120 Exhaust aluminum rods
 
 
 
 
 

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