Race-Rite® Big Block Series/24°

Package Heads

Facts and Related Components

• PS Valve Job:
Competition Valve Job

• Intake Valves:
2.300 x 5.568 o.a.l. – BR 81341

• Exhaust Valves:
1.880 x 5.494 o.a.l. – BR 81138

• Valve Springs:
1.550 Roller Valve Spring – GA 1000,
240 lb Closed, 550 lb Open,
1.950 Installed Height,
.700 Maximum Lift1.640 Roller Valve Spring – MA 221424,
250 lb Closed, 745 lb Open,
2.050 Installed Height,
.800 Maximum Lift (Spring Upgrade)1.645 Roller Valve Spring – CC 947 or CC 948,
315lb Closed, 915 lb Open,
2.100 Installed Height,
.850 Maximum Lift (Spring Upgrade)

• Retainers:
1.550 10° Steel – CC 752
1.625 10° Titanium – MA 23640
1.645 10° Titanium – MA 2001

• Valve Locks:
10° Jumbo – CC 611

• Rocker Studs:
7/16 – BR 716L, AR RRS-4I

• Guide Plates:
3/8 – CC 4806

• Valve Seals:
11/32 – US VS529V
(1.550, 1.625 Valve Spring)
11/32 – US VS485V
(1.645 Valve Spring)

• Intake Gaskets:
BRODIX MG 2001, FP 152-3
(RR BB-3 XTRA 345)
BRODIX MG 2009
(BP RR BB-3 XTRA O)

• Head Gaskets:
4.540 – FEL-PRO 1017, COMETIC C5433
4.600 – FEL-PRO 1057, COMETIC C5434

• Exhaust Gaskets:
FEL-PRO 1411, COMETIC C5429

• Head Bolts:
ARP 135-3606, MANLEY 42192 / MANLEY 42102

• Head Studs:
ARP 235-4702 (12 pt)

• Accessory Bolt Holes Are Drilled

• Spark Plug Starting Points:
NGK R5671A-10
for Alchohol
NGK R5671A-9
for Racing Gas

• Spring Pockets:
May be Cut Any Larder or Deeper Than 1.750

• Valve Angle:
24° and 4° Intake,
15° and 4° Exhaust

• Angle Milling:
.0066 in Per cc

• Flat Milling:
.0050 in Per cc

• Angle Machining:
Not Available on CNC Ported Heads

• Dowel Shift:
N / A

• Pushrod Slots:
Standard

• Stud Girdle:
Standard,
BRODIX 1230

• Rocker Arms:
Standard

• Lifters:
Standard

• Pistons:
2° Valve Rolled Pistons

• Pushrods:
Check Pushrod Clearance with Head Installed on the
Engine Block Before Final Assembly

• Intake Manifold
BM 2017* / BM 2027*
(RR BB-3 XTRA 345)HV 2007 / HV 2008 / HV 2017
(BP RR BB-3 XTRA O)
*Oval Port Manifold MUST Be Port Matched to Fit Rectangular Port Heads