Thanks for that ref but I think a better one is
https://www.youtube.com/watch?v=4dmSaZ6mw-c
If you want accurate details and a review by an owner rather than a sales pitch by Bonhams.
One detail I did not know is that they had to change the Vee angle of the engine from 60 degrees to 54 on the 4 cam in order to get it under the bonnet. I thought the slight bulge was enough.
A classic error that the owner repeated, however, was that the 275 was designed by PininFarina. Yes the 250 was designed by him (he was a great friend of Enzo Ferrari) but it it was the racing department under Scaglietti across the road at Modena who made all the changes to the 250 design to reduce drag and high speed lift. Sadly, by the time the car was ready, the rear engined opposition was the new kid on the block and the 275 did not gain the racing success and aura of it's 250 predecessor.