Have you selected a camshaft? My build it quite similar to yours, but a little heavier car. 408 Magnum block roller.
I am looking at this Lunati:
Retro-Fit Hydraulic Roller. Serious street/race cam. Needs 10.5:1 compression and 3200 RPM stall converter. Works with moderate nitrous and small superchargers. Healthy idle quality.