DART CNC'd 225cc Pro 1 Race Heads

225cc Runner, 62cc chamber

325 CFM!

Material: 355T6 alum alloy

Comb Chambers: 62cc

Intake Valve Dia: 2.08”

Intake Port volume: 225cc

Intake Port Dim: 2.150”x 1.300”

Int Port Location: Stock

Intake Gasket: Fel-Pro# 1262

Exh Valve Dia.: 1.600”

Exh Port volume: 87cc

Exhaust Port Dim: 1.420” x 1.420” w

Exh Port Location: Raised .135” Spread bolt pattern / SVO

Exhaust Gasket: Fel-Pro#

Flow, Intake: 325 cfm @ .700” lift / 28”

Flow, Exhaust: 235 cfm @ .700” lift / 28”

Head Bolts: Dart & 351W block 1/2" OD ARP# 154-3603 302 block 1/2"-7/16” stepped washer ARP# 154-3603

Head Studs: Dart & 351W block 1/2" OD ARP# 154-4003 302 block 1/2"-7/16” stepped washer ARP# 154-4005

Manifold: Most with std port location

Milling: Min. 50cc (.0065” = 1cc) Flat Mill

Pistons: Most 20º aftermarket pistons.

Push Rod length: Should measure

Push rod Guide Plate: Comp Cam # 4816 (flat)

Retainers: Steel (10º)

Spark Plug: .750” reach, gasketed, Champion C59C / C59YC

Spring Pockets: 1.550” OD (.030” deeper max)

Springs: Our Assembly: 1.437D = 130# 1.800” (solid & hyd roller) 1.550D = 195# 1.900” (solid roller)

Stud Girdle: Use any standard girdle

Valve Length: Std 4.890” / 5.015” (+.100)

Valve Stem Dia: .3415” - 11/32”

Valve Train: Std SBF 3/8” or 7/16” stud mount

Valve Guides: 1/2” OD Mag-bronze (.002” press)

Valve Guide length: 2.080”

Valve Guide clearance: .0014” - .002” (with our .3415 dia. valve stem)

Valve Guide Spacing: 1.876” exh moved .050” from stock

Valve Seats: Hardened Ductile Iron, .006” press

Valve Seat dim. Int - 2.160x 1.810 x .350 Ex - 1.650x 1.350x .350

Valve Seat angles: Int = 32º- 45º- 60º- 70º Ex = 37º- 45º- radius

Torque: Head Bolts = 70 ft/lb; Rocker Studs = 45 ft/lb; Manifold = 18 ft/lb

Block Use: Dart Iron or Aluminum & any Ford

Weight: 23 lbs