Alright Indy, here is the data
Spec Value
Bore & Stroke: 3.903" x 4.000"
Displacement: cubic inches 383ci
Rod Length: 6.125"
Heads Make/Model with flow numbers: Flow (CFM) at several lift points. stock 706 heads that I will port- for flow see note 1
Combustion Chamber Size in CC’s: 61cc
Dome Volume: For a domed piston use a (-) negative number: 0
Valve Relief Volume: For a piston with valve reliefs or dish, use a (+) positive number. +15cc
Deck Clearance: 0.005"
Head Gasket Bore: 3.910"
Head Gasket Thickness: 0.036"
Valve Sizes Intake/Exhaust: 1.89/1.55
Intake Manifold Model Type: [Single or Dual Plane] stock ls truck manifold (not sure what to put here)
Model #: 78mm TB
Carburetor Size or EFI (CFM): 792 cfm
Blower/Turbo Make/Model: none
Belt Ratio: no turbo
SCR & DCR: SCR: 10.3 & DCR 8.3 (DCR listed with CAM info in note 2, I calculated it with +25 degrees from 0.050" as per the wallace racing calculator info this is slightly higher than the DCR calculated based on seat-to-seat DCR)
Header Tube Diameter: 1-7/8"
Cam Card: Need all 8 valve timing events at seat-to-seat and at 0.050” & lobe lift or valve lift See note 2
Rocker Ratio - Intake/Exhaust: 1.7
Cam Installed per Cam Card, or Retarded or Advanced: 0 advance or retard
Fuel Used: Gasoline, Methanol, Ethanol, E85 ..... Gasoline
Note 1 - Cylinder Head flow *this is for non-ported heads*
Lift (inches) Intake (cfm) Exhaust (cfm)
0 - 0 0
0.05 27.7 24.6
0.1 59.9 48.7
0.2 126.5 89.1
0.3 180.6 126.2
0.4 213.4 158.1
0.5 220.5 180.9
0.6 231.3 193.5
0.65 234.2 198.1
0.7 237.1 201.6
Note 2 - Camshaft info *SCR is posted with each camshaft*
INTAKE EXHAUST
opens closes opens closes DUR @ 0.050" DUR @ 0.006" LIFT with 1.7 rocker
BTDC ABDC BBDC ATDC int/exh int/exh LSA int/exh DCR
Option 1 -1 39 47 0 218/227 278 287 112 0.600/0.600 8.3
Option 2 0.5 44.5 53.5 -1.5 224/232 280 287 115 0.590/0.590 8.3
Option 3 3 43 55 3 226/238 275 288 113 0.600/0.600 8.1
I will upload a pdf of the cam info in case that table I made doesn't make sense, or if your screen size makes it hard to read.