TuFun, it's looking great and you must have the patience of Job to be able to work towards such levels of perfection.
As for Torino engines, mine was the 400 with a C6 tranny. I really liked and preferred the 351 Cleveland as it was slightly smaller and there were way more performance parts for the 351C than the 351M and 400 engines. Shortly after I bought the car, the first thing I did was to pull the two barrel carb and cast iron intake manifold and swap in an Edelbrock Performer dual plane aluminum manifold and a Holley 750 cfm vacuum secondary carb. 750 cfm was way too much carb for the tired, old 400 and was still a little too much for the 400 I built for my Torino. If I were to do it again, I think I'd use a Carter AFB carburetor as they seem to have better idle and part throttle performance than most Holley carbs. I did consider swapping in a 351C, but that would have meant new motor mounts, new transmission and probably a new drive shaft, but that was way more expensive than building a high performance 400 and rebuilding the existing transmission.