Low speed torque and driveability ?
Obviously this ain't an everyman build but does shows higher hp per cid engines built with high torque to cid can carry a lot of torque at low rpms too. But I bet even with all that low end torque this engine wouldn't be happy with stock stall and 2.xx gears especially with it's 106 lsa.
https://www.motortrend.com/articles/1208phr-371ci-mopar-small-block/
Here's an 371 with ported EQ 246/244 hydraulic roller making 515 @ 5900/6000 rpm
495 @ 4800 and 401 @ 2500 rpm, this engine putting out similar hp & torque at similar rpms as some 408.
| RPM | TQ | HP |
| 2,500 | 401.5 | 191.1 |
| 2,700 | 408.4 | 202.1 |
| 2,900 | 426.2 | 235.3 |
| 3,100 | 429.6 | 253.6 |
| 3,300 | 430.8 | 270.7 |
| 3,500 | 425.3 | 283.4 |
| 3,700 | 431.3 | 303.8 |
| 3,900 | 444.9 | 330.4 |
| 4,100 | 461.2 | 360.0 |
| 4,300 | 473.9 | 388.0 |
| 4,500 | 486.1 | 416.5 |
| 4,700 | 493.7 | 441.8 |
| 4,800 | 495.0 | 452.4 |
| 4,900 | 494.3 | 461.1 |
| 5,100 | 491.9 | 477.7 |
| 5,300 | 485.9 | 490.4 |
| 5,500 | 480.7 | 503.4 |
| 5,700 | 470.9 | 511.1 |
| 5,900 | 458.4 | 515.0 |
| 6,000 | 450.9 | 515.1 |
| 6,100 | 441.5 | 512.7 |
| 6,300 | 424.1 | 508.7 |
| 6,500 | 402.9 | 498.6 |