On running numbers on My EA dyno I would leave the Racer brown installed where it is on a 383 or 440 maybe more advance but not on a 493.
Should give you 450 foot lb @ 2500 and peak torque 540 @ 3500.
Peak hp at 5000 so a 5500 all out shift point??
the solid .528 would give about 3 to 4 more hp and about the same more in torque not sure the switch to solid would be worth it??