[V]

I'm thinking of getting the Dart Pro 1 LS1 heads for my new SS motor.
Im just wondering about a combustion chamber size. These are 62cc, and my rotating assembly is 8.5:1 CR based on 67cc heads. I will be forced induction so i wanna stay as close to 8.5:1 as possible.
Right now i can get a great deal on the heads so im trying to find out asap.
These are the specs...

Originally Posted by Summit Racing Equipment

Brand:Dart
Product Line:Dart Pro 1 LS1 Cylinder Heads
Cylinder Head Style:Assembled
Cylinder Head Material:Aluminum
Cylinder Head Finish:Natural
Combustion Chamber Volume (cc):62
CNC Machined Combustion Chamber:No
Intake Runner Volume (cc):225cc
CNC Machined Intake Runner:No
CNC Machined Exhaust Runner:No
Combustion Chamber Style:Heart
Intake Port Location:Standard
Exhaust Port Location:Standard
Intake Valves Included:Yes
Intake Valve Diameter (in):2.050 in.
Exhaust Valves Included:Yes
Exhaust Valve Diameter (in):1.600 in.
Valve Springs Included:Yes
Maximum Valve Lift (in):0.625 in.
Outside Diameter of Outer Spring (in):1.290 in.
Damper Spring Included:No
Number of Springs Per Valve:Single
Retainers Included:Yes
Retainer Material:Steel
Locks Included:Yes
Lock Style:7 degree
Valve Stem Seals Included:Yes
Valve Stem Seal Style:PC seal
Rocker Arm Studs Included:No
Rocker Arms Included:No
Rocker Arm Nuts Included:No
Guideplates Included:No
Valve Cover Mounting Style:Centerbolt
Accessory Bolt Holes Drilled:Yes
Valve Guides Included:Yes
Valve Guide Material:Manganese bronze
Valve Seats Machined:Yes
Valve Seat Machine Style:4-angle intake/2-angle exhaust
Valve Seat Material:Powdered metal
Steam Holes Drilled:No
Oiling Style:Through head
Machined for O-Ring:No
Heat Crossover:No
Quantity:Sold individually.