if it has vortec heads( 8 5/16 intake bolts), you are supposed to prop it out to 4600-5000 rpm, if it has non vortec heads(12 3/8 bolts) 4400-4800 RPM. Check your tach to make sure its accurate. With the bravo you are loosing a little hp in the drive compared to an Alpha, but its a much beefier drive. For top end, you may want to play with a prop with a little more rake than the Mirage like a tempest, but its going to hard to beat the all around performance of a Mirage
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