Dana I set mine right at 6000 rpms because mine engine was run for 3 days on dyno for break in and checked for any leaks so I ran it hard from day one.I would recommend setting it at 4000 rpms for first 400-500 miles change
oil and set it at 6000 because thats were your power stops anyway so why go higher.If you stick with the single plane manifold maybe go up to 6400 rpms.