Clear

Flo-Tek Recommended Setup:
Header – Based on Chassis-2 1/8”
Rocker Arms – Isky Roller Rockers 204-96 1.75:1 or Equivalent
Intake Manifold – Victor JR or Super Victor

A powerful, out-of-the-box cylinder head design matched with an outstanding, unbeatable casting technology. We are here to tell you…this BBC head does just that! FLOTEK Aluminum Cylinder Heads are a great choice for out of the box horse power. These FLOTEK Cylinder thick Deck Design and High Capacity water jackets that makes them a reliable choice for street or strip applications.

The FLO-TEK BBC 320 takes stock pistons and has raised valve cover rails. The BBC 320 Exhaust Port location is raised .500. 

VALVE SPRINGS:

HYDRAULIC ROLLER (.600 Lift) – Spring Kit: PSK-637-1-7 Hydraulic Roller Dual Valve Spring 1.50″ O.D., Max RPM 6500-6700
Valve Spring: PSK573-1-10 CL 225# @ 1.90 OP 530# @ 1.28 C/BIND 1.18

SOLID ROLLER (.700 Lift) – Spring Kit: PAC 1228 Roller Valve Race Spring 1.625″ O.D Solid Roller Valve Spring, Max RPM 7200-7400
Valve Spring: PSK623-1-10 CL 290# @ 1.90 OP 625# @ 1.30 C/BIND 1.17

SOLID ROLLER (.800 Lift) – Spring Kit: PAC 1248 Roller Valve Race Spring 1.645″ O.D Solid Roller Valve Spring, Max RPM 7200-7400
Valve Spring: PAC1224 CL 275# @ 2.00 OP 810# @ 1.150 C/BIND 1.100

  • Headers will bolt on in most applications. Some may have interference.
  • Recommendations: Hooker Super Comp Headers
  • Stock Bolt Spread
  • May be necessary to use lowered motor mounts

Description


Specifications, Features & Optional Supporting Components

Head Bolt Torque75 Ft Lbs w/ oil
Rocker Stud Torque50 Ft Lbs w/ oil
Intake Port GasketFel Pro 1252-3 (320) Fel Pro 1211 (360)
Exhaust Port GasketFel Pro 1404
Head GasketFel Pro 1017-1 (4.500) 1057 (4.630)
Head Bolts & StudsARP 135-3703 (12pt) 135-3606 (6pt) 235-4303 (Stud)
Stud GirdleHarland Sharpe G1114 (7/16)
Suggested ManifoldVictor Jr, Super Victor
Spark Plug Starting Range14mm (.750) Accel #416
Intake Port Volume320 cc
Exhaust Port Volume128cc
Combustion Chambers133cc
Max Spring Pocket Diameter1.725” O.D.

Basic Package Components:
Intake Valve .6002.250 .100
Exhaust Valve .6001.880 .100
Intake Valve .7002.250 .250
Exhaust Valve .7001.880 .100
Intake Valve .8002.250 .250
Exhaust Valve .8001.880 .100
RetainersHardened Chrome Moly
Valve Locks .6007 Degree Valve Locks
Valve Locks .700/.80010 Degree Valve Locks
Guide PlatesDART 2700123-4/PC-4247
Rocker StudMust have Clearance for Valve Spring Retainers
Valve SealsViton Positive Seals
Spring CupHardened Steel Cups
Intake Valve SeatPowder Metal
Exhaust Valve SeatPowder Metal
Bronze Valve GuidesManganese Bronze


Part Specification

Flo-Tek Cylinder HeadID#Part Number
BBC 320 Assembled .600 lift00850134007082305-5056
BBC 320 Assembled .700 lift (Triple Spring)00850134007105305-5057
BBC 320 Assembled .800 lift00850134007341305-5058
BBC 320 Bare00850134007112306-500


Flow Chart

 

bbc-320-flow-chart


Dimensions & Weight

Big Block Chevy Bare32 Pounds
Big Block Chevy Assembled40.6 Pounds
Length24.5”
Width10.5”
Height9”


Additional information

Weight 43 lbs
Dimensions 22.25 x 8.5 x 5 in
Part#

BBC 320 Assembled .600 lift (305-5056), BBC 320 Assembled .700 lift (Triple Spring) (305-5057), BBC 320 Assembled .800 lift (305-5058), BBC 320 Bare (306-500)