402CI Build SheetSpecifications not listed are the same as stock. Except as noted, all dimensions are in inches or fractions thereof. All prices sourced through Turn Key Engine Supply, Summit Racing, JEG's, and Scoggin Dickey Parts Center.
| Displacement | 402ci |
| Bore x Stroke | 4.00x4.00 |
| Compression | 11:1 |
| Rod center-to-center | 6.125 |
| Piston deck height | -0.012 |
| Chamber volume | 62cc |
| Rod bearing clearance | 0.0028 |
| Crank endplay | 0.004 |
| Piston ring endgap | 0.023 top; 0.023, second |
| Main bearing cap torque | 65 ft-lb (moly-lube) |
| Main bearing/cross-bolt | 22 ft-lb (moly-lube) |
| Rod bolt torque | 50 ft-lb (moly-lube) |
| Head bolt torque | 65/70 ft-lb (moly-lube) |
| Henry's Cost |
| Manufacturer | Part Number | Description | Price |
| ARP | 243-4317
| Head Stud Kit | 254 |
| Comp Cams | 54-446-11
54-448-11
875-16
13755-KIT
7955-16 | XER281HR
XER287HR
R-Series lifters1.75 rocker kit
51/416-inch pushrods | 407
(or) 407
246
487
134 |
| Dart | 11021122 | Pro 1 LS1 | 1,620 |
| Edelbrock | 2908 | Victor Jr. LS1 manifold w/module | 642 |
| Lunati | EA036-395 | Rotating assembly | 3,584 |
| MSD Ignition | 82458 | Coil packs | 579 |
| | 32079 | 8.5mm Super Conductor wire set | 98 |
| Turn Key Engine Supply | 12568950
51611
SD7245
12558936 | LS2 block
Chrome balancer
Double-roller timing chain
Steel head gaskets | 995
280
84
66 |
| | Total | $9,476 |
What's It Flow?
| DART Pro 1 LS1 |
| CFM at 28 inches H20 |
| Lift | Intake | Exhaust |
| 0.200 | 144 | 109 |
| 0.300 | 202 | 154 |
| 0.400 | 254 | 187 |
| 0.500 | 290 | 205 |
| 0.550 | 301 | 210 |
| 0.600 | 313 | 214 |