Guys... take a clean, new engine, new car... all the tools on hand... plenty of space... a helping hand upon request... no interruptions... LOTS of experience... add a dose HUSTLE. Yup - those mhr estimates are way too high. Trouble is - most cars and engines are filthy and rusted. Threads need to be chased and/helicoiled. Hours need to be spent in a solvent tank. New tools likely need to be fabricated. Most all shops have limited space. Often times nobody is around to offer a few minutes of helping hands now and then. Everybody gets interrupted. Those who routinely work on Testarossas are few and far between. Most are not in a race to ‘get it done’. Take the best case hours and multiply by at least 1.5 - 2.0 to get into the realm of reality (in a professional shop). For an old guy like me - use a factor of 4 to 5. I can’t count how many hrs have been spent researching the right part, with the right specs and the right finish. ‘removing the head’ is a far cry different from ‘refurbish the head’. PS: if your shop offers to do just one head - you are in the WRONG shop.