V35TC shows 75% power at 2500 RPM at 24,000ft. Thats a cruise speed. The book shows that as full throttle. 214 HP, 15.5 US gal per hour, (58.74 LPH).
The normally aspirated V35 is 2 Kts off the mark, so if you fly light I don't see any reason why a competent pilot can't make it achieve 180 Kts.