Nicks Garage 383 build
Even this stock ish 383 made stock hp but only 395 lbs-ft wasn't until they added headers and more carb did it hit 425 lbs-ft.
https://www.motortrend.com/articles/mopp-0209-upgrading-the-383-magnum-avs-carb/
| Torque | | | | | |
| RPM | STK | HDRS | CARB | INTKE | CAM |
| 3000 | 382.7 | 406.3 | 427.1 | 405.5 | 394.2 |
| 3200 | 388.1 | 406.6 | 422.6 | 410.9 | 400.0 |
| 3400 | 388.3 | 412.6 | 431.9 | 421.2 | 414.7 |
| 3600 | 394.6 | 411.2 | 433.7 | 426.1 | 431.5 |
| 3800 | 392.4 | 408.3 | 430.8 | 430.0 | 435.5 |
| 4000 | 387.2 | 401.3 | 424.6 | 433.0 | 446.5 |
| 4200 | 377.8 | 396.2 | 416.4 | 430.1 | 451.5 |
| 4400 | 371.4 | 390.2 | 409.7 | 430.1 | 451.8 |
| 4600 | 367.8 | 384.6 | 402.0 | 427.8 | 454.2 |
| 4800 | 361.6 | 379.5 | 398.5 | 424.3 | 456.6 |
| 5000 | 355.1 | 373.4 | 385.6 | 421.3 | 450.3 |
| 5200 | 337.2 | 357.8 | 368.1 | 407.7 | 449.1 |
| 5400 | 322.8 | 348.5 | 351.4 | 395.1 | 435.8 |
| 5600 | | 417.0 | | | |
| 5800 | 407.6 | | | | |
| 6000 | 398.2 | | | | |
| Horsepower | | | | | |
| RPM | STK | HDRS | CARB | INTKE | CAM |
| 3000 | 218.6 | 232.1 | 244.0 | 231.6 | 225.2 |
| 3200 | 236.5 | 247.7 | 257.5 | 250.3 | 243.7 |
| 3400 | 251.4 | 267.1 | 279.6 | 272.7 | 268.5 |
| 3600 | 270.5 | 281.9 | 297.3 | 292.1 | 295.8 |
| 3800 | 283.9 | 295.4 | 311.7 | 311.1 | 315.1 |
| 4000 | 294.9 | 305.6 | 323.4 | 329.8 | 340.0 |
| 4200 | 302.1 | 316.8 | 333.0 | 343.9 | 361.1 |
| 4400 | 311.1 | 326.9 | 343.2 | 360.4 | 378.5 |
| 4600 | 322.2 | 336.8 | 352.1 | 374.7 | 397.8 |
| 4800 | 330.5 | 346.8 | 364.2 | 387.8 | 417.3 |
| 5000 | 338.0 | 355.5 | 367.1 | 401.1 | 428.7 |
| 5200 | 333.9 | 354.2 | 364.5 | 403.7 | 444.6 |
| 5400 | 331.9 | 358.3 | 361.3 | 406.3 | 448.1 |