Cylinder Heads Ford BB 429/460 Aluminum Assembled Set

Description

Speedmaster Blacklabel’s BB Ford 429/460 3051 ASSEMBLED 
Aluminum Cylinder Heads,  PAIR
356-A Aluminum Alloy Heat treated to T-6 Specifications.
Patterned after the popular Edelbrock heads,
95cc Combustion Chamber, Open Chambers,  275cc Intake Runners, 
.400″ thick deck for use with nitrous, ultra high compression, and turbo/superchargers
Oval  Ports-Intake 2.005″x 1.510″  Exhaust 1.8125″x 1.375″,
3 Angle Cut Stellite Valve Seats Hardend,
Valve Seats cut for 2.190″ Intake & 1.710 Exhaust
(Designed to withstand blowers, turbos, and nitrous. )
Manganese Bronze Valve Guides,
Will accept all factory accessories. Heads are drilled with all OEM accessory bolt holes.
Fits All OEM Bolt Pattern Manifolds, 

Uses Spark Plug with 14mm thread 5/8″ hex , .750″ reach.
Uses Felpro Intake Gasket #1231, Felpro Exhaust Gasket #1420, Felpro Head Gasket #1018 under 4.500″ bore.
Exhaust Bolt Pattern Ford not Chevy, 

Head Bolts Take 65 Ft.Lb Torque with Short Bolts, 70 Ft.Lb with Long Bolts & moly lube.

ASSEMBLED HEADS INCLUDE;
S/S Intake Valves- 2.190/ Stock,  S/S Exhaust Valves- 1.710/ Stock
4140 Steel Retainers 1.400 x 1.060 x 0.690
10 deg. Valve Locks +.145
8005 Single Spring w/dampener,   springs are designed for big block motors that require a 1.5250 outer diameter spring. Springs are designed for street/strip applications with cam combination with no more than .600 lift.

Spring pressures and install heights are as follows.
140lbs at 1.900
165lbs at 1.850
180lbs at 1.800
350lbs at 1.300
365lbs at 1.250
380lbs at 1.200
Coil bind at 1.160
Install spring height should be checked with your camshaft specs of your application.

FLOW FIGURES;
Average Flow Figures @28″ CFM Water Intake (according to manufacturer tests).