Dart Pro 1 top end kits use the same premium components that Dart assembles their racing series heads with. They are cast with high-grade C355-T61 aircraft aluminum and wet-flow designed for peak performance.
Dart top end kits include:
- Fully assembled cylinder heads
- Stamped steel valve covers
- Cam-shaft and Lifters
- Intake gaskets, head gaskets, and exhaust gaskets
- Spark plugs
- ARP head bolts
Available with full CNC porting as well!
Dart
Platinum 180 SBC 23° Aluminum Cylinder Head
Material:
355T6 alum alloy
Comb Chambers:
64cc & 72cc
Intake Valve Dia:
2.02”
Intake Port volume:
180cc
Intake Port Dim:
1.190”w x 2.075”h
Int Port Location:
Stock
Intake Gasket:
Fel-Pro# 1205 Mr. Gasket 106
Exh Valve Dia.:
1.600”
Exh Port volume:
75cc
Exhaust Port Dim:
1.410”w x 1.350”t
Exh Port Location:
Stock location & bolt pattern
Exhaust Gasket:
Fel-Pro# 1404 Mr. Gasket 150c or Ultra Seal 5900
Flow, Intake:
257 cfm @ .500” lift / 28”
Flow, Exhaust:
172 cfm @ .500” lift / 28”
Head Bolts:
ARP# 134-3601 or can also use o.e. style bolts.
Head Studs:
ARP# 134-4001 or 234-4301 (12pt)
Manifold:
Dart dual plane 42811000
Milling:
Min. 58cc = .060” (.0065” = 1cc) Flat Mill
Angle mill .125” safely .200” = 49cc 1.5
° (carefully)
Pistons:
Most 23°aftermarket pistons.
Push Rod length:
Stock thru +.100” Should always measure (Stock length = 7.800”)
Push rod Guide Plate:
Dart guide plate 27001110 or Comp Cams 4808
Retainers:
Steel 7° with 1.250” springs, and Steel 10° with 1.437” and 1.550”
Spark Plug:
Angle or straight, .750” reach, gasketed, Autolite AR3934
Spring Pockets:
Cut for up to 1.550” diameter springs. Can cut .030” deeper max
Springs:
Our assembly:1.250S = 110# @ 1.700” / .520” max Comp 981
1.437D = 130# @ 1.800” / .620” max Comp 987
1.550D = 195# @ 1.900” / .690” max Comp 954
Valve Length:
Std 4.890” w/ 1.250 & 1.437 / 5.015” (+.100) w/ 1.550
Valve Stem Dia:
.3415” - 11/32”
Valve Train:
Std SBC 3/8” or 7/16” stud mount
Valve Guides:
.439” Outside diameter Int. and Exh. Mag-bronze (.002” press)
Valve Guide length:
2.100”
Valve Guide clearance:
.0014” - .002” (with our .3415 dia. valve stem)
Valve Guide Spacing:
1.890” moved .030” from stock
Valve Seats:
Hardened ductile iron, .006” press
Valve Seat dim.
Int - 2.160”x 1.810” x .350” Exh - 1.650”x 1.350”x .350”
Valve Seat angles:
Int = 32° - 45° - 60° - 70° Exh = 37° - 45° - radius
Stud Girdle:
Use any standard girdle
Torque:
Head bolts = 70 ft/lb
Rocker studs = 45 ft/lb
Manifold = 35 ft/lb
Block Use:
Any SBC iron or aluminum
Weight:
23 lbs. bare