Ask and ye shall receive. But first... you can't really take DD2000 as 100% accurate. It may be close, may not be... take the numbers for comparison purposes.
355 cubic inch with first solid, flat-tapped cam and 462 casting heads (one of the better flowing factory heads of the 60s). 10.5:1 compression, and "single plane" manifold (equivalent to the Edelbrock Victor Jr.).
398 horses @ 5500rpm, 418 ft. lbs. torque @ 4500rpm.
If you up the cubes to 383...
392 horses @ 5500rpm, 436 ft. lbs. torque @ 4000rpm.
With the second cam... all else being the same.
355 cubic inches =
403 horses @ 5500rpm, 429 ft. lbs. torque @ 4500rpm.
383 cubic inches =
399 horses @ 5000 rpm, 450 ft. lbs. torque @ 4000rpm.
Now, if you were to run with some better flowing heads (a little more appropriate with these cams)... say the AFR 210cc head.
First cam ...
355 cubes = 469 horses @ 6500rpm, 440 # torque @ 4500rpm
383 cubes = 474 horses @ 6000rpm, 465 # torque @ 4500rpm
Second cam...
355 cubes = 488 horses @ 6500rpm, 448 # torque @ 5000rpm
383 cubes = 480 horses @ 6500rpm, 475 # torque @ 4500rpm