A 1.20 4 stroke would be great as it'll give you the low end grunt without having to rev. EXACTLY what you're looking for.<div>Use a MAS 16x6-8 classic prop. You'll be amazed at the sound. The prop blade, even though looking great, is such an inefficient design compared to todays APC's, but for once this is to your advantage. Those big ol' bades move so much air and create such a wonderful sound compared with a modern design, APC or similar. Try the combo: Stearman/1.20 4stroke/MAS classic 16x6. You'll be SUPER happy.</div>