usually that means Pro Comps, but at least its better than the old smogger heads most people think are fast.

 

Yeah I know what you mean, but every now and then you get the "Corvette aluminum heads" deal, and that's when things get interesting.

 

pro comp specs below


Cnc'd Comb Chambers: 64cc
Intake Valve Dia: 2.02”
IntakePort volume: 210cc
IntakePort Dim: 2.247” x 1.218”
IntPort Location: Stock
Intake Gasket: Fel-Pro# 1266 seems to work better than the Fel Pro 1206 The 1266 is the same gasket as the 1206 but much thicker.
Exh Valve Dia.: 1.600”
ExhPort volume: 70cc
ExhaustPort Dim: 1.356” x 1.420” w
ExhPort Location: Stock location & bolt pattern
Exhaust Gasket: Fel-Pro# 1405
Flow, Intake: 264cfm @ .700” lift / 28”
Flow, Exhaust: 152cfm @ .700” lift / 28”
Head Bolts: Must use extended reach with true head bolt washers or head studs. See our other listings for accessories.
Head Studs: PC-2451-STUDS (12pt)
Manifold: MOST ANY
Milling: Min. Down to 58cc = .060” (.0065” = 1cc) Flat Mill
Pistons: Most 23°aftermarket pistons.
Push Rod length: Stock thru +.100” Should always measure (Stock length = 7.800”)
Push rod Guide Plate: We strongly recommend adjustable guide plates. You may use raised fixed guide plates, but adj. plates are much preffered.
Retainers: Steel 10°
Spark Plug: Angle or straight, .750” reach, gasket, Autolite 5224 or equivlent.
Spring Pockets: 1.550” OD (.030” deeper max)
Springs: Our Assembly: 1.44 outer diameter. single with a damper for hyd. flat tappet cams. setups are available for hyd. roller cams.

Valve Length: 5.015” (+.100”) for hyd. flat tappet cams or + .200 for hyd. roller cams
Valve Stem Dia: .3415” - 11/32”
Valve Train: STD SBC 3/8” or 7/16” stud mount
Valve Guides: 1/2” OD Int = Mag-bronze Exh = Phos-bronze (.002” press)
Valve Guide length: 1.950”
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. Standard
Valve Seat angles: Int = 32° - 45° - 60° - 70° Exh = 37° - 45° - radius
Stud Girdle: Use any standard girdle
Torque: Head Bolts = 65 ft/lb
Rocker Studs = 55 ft/lb with fixed guide plates, and 60 ft/lb when using adjustable guide plates.
Manifold = 35 ft/lb
Block Use: Any SBC Iron or Aluminum
Weight: 62 lbs fully assembled pair.

 

ok reviving old thread. alot has gone on since last years pathetic car run. im going to list what i currently have on the vehicle, so hopefull i can get into the 12s. any comments/input welcome.
head specs above
air gap intake
holley 650 mechanical secondary carb
edl-7102 cam same as before
posi unit with 3.73 gears and 28 spline axles
drag radials 275/60/15
subframe connectors
nos 125 shot (only if needed to go faster )
accell spark plugs .35 gap
msd 8.5 mm wires
accell cap and rotor
hei distributo with vac advance disconnected
msd ignition
d.u.i. coil
th350 trans 2800 stall
and cars about 3300-3250 pounds est.
am i getting anywhere with this build? i be happy with 12.99-12.75 and use nos to get lower