That has to be an L-79 , which has been de-factored to 300 HP (X 9 # / hp + 170 pounds)

2,870 pounds

Online calculator sez it needs 508 flywheel HP to run 11-flat @120, which is only .65 under the index.

C/S record is 10.49.

It would need 600 HP to run the record (10.49 @ 128).

Tht's 1.80 HP per cubic inch... a tall order considering the smallish Holley (560 cfm?) on top.

Sounds like it needs some more HP off the factor, another tall order, since it's already been granted a 50 HP reduction.

NEAT car, though!!! Good luck!