I was estimating based off this 323 that makes 477 hp @ 6500 rpms and 427 tq @ 4,900 rpms, making with a decent 1.32 lbs-ft per cid and 90% of of peak torque at peak power.
| RPM | TQ | HP |
| 2,500 | 337 | 161 |
| 2,600 | 350 | 173 |
| 2,700 | 357 | 183 |
| 2,800 | 357 | 190 |
| 2,900 | 356 | 196 |
| 3,000 | 351 | 201 |
| 3,100 | 345 | 204 |
| 3,200 | 339 | 207 |
| 3,300 | 343 | 216 |
| 3,400 | 356 | 230 |
| 3,500 | 371 | 247 |
| 3,600 | 385 | 264 |
| 3,700 | 396 | 279 |
| 3,800 | 404 | 292 |
| 3,900 | 410 | 305 |
| 4,000 | 415 | 316 |
| 4,100 | 418 | 327 |
| 4,200 | 420 | 336 |
| 4,300 | 422 | 345 |
| 4,400 | 421 | 353 |
| 4,500 | 420 | 360 |
| 4,600 | 421 | 369 |
| 4,700 | 425 | 380 |
| 4,800 | 426 | 390 |
| 4,900 | 427 | 398 |
| 5,000 | 427 | 407 |
| 5,100 | 427 | 414 |
| 5,200 | 426 | 421 |
| 5,300 | 425 | 428 |
| 5,400 | 423 | 435 |
| 5,500 | 421 | 440 |
| 5,600 | 419 | 446 |
| 5,700 | 417 | 453 |
| 5,800 | 415 | 458 |
| 5,900 | 412 | 462 |
| 6,000 | 407 | 465 |
| 6,100 | 401 | 466 |
| 6,200 | 397 | 469 |
| 6,300 | 393 | 471 |
| 6,400 | 390 | 475 |
| 6,500 | 386 | 477 |