What Padfoot said -apart from a few token blacks, African Americans are a lost cause for the GOP, and have been since the 1960s (thank Barry Goldwater and Richard Nixon's Southern Strategy for that legacy):
Best to focus your outreach on Latinos and Asians.
First, the Southern strategy was about outreach to suburban, moderate Southerners, not white racists. And second, the GOP definitely needs to improve black outreach. We don't need to win the black vote yet, but we need to start chipping away at the Democrats' advantage.
Those so called "moderates" we're just better at hiding their racial biases. The flip of the south from dem to GOP is totally attributable to racial politics and it remains largely so to this day. The southern strategy first employed by Nixon used racial dog whistles that allowed people to shield their prejudices while still openly talking about inherently racial issues.