just say YES! to MSD

The orange box is good for stock engines. headers and 4bbl upgrades are fine additions, small cam OK, but would stop there.
Chrome box or FBO unit are very good for a mile to hot motor set up.
A Gold box is a race only unit and would skip it in most cases in favor of modern set ups.
The MSD 6 boxs, though I have had teribble times with them are fine for stock to lil'wild set ups. It can take your car far.