Doing a bit of research and putting together a parts list for a future build. Am I correct that this would be a standard large hatch M4 hybrid upper hull, one piece FDA and a low bustle mid production turret without a loaders hatch and no pistol port?

What you've described would be the most common type, though high bustle turrets with pistol port and loader's hatch became available late in the production run. The final drive assembly was the pointed type.

Thanks for the info.

As Gerald said, your items are often seen in actual photos. But the turrets were not necessarily from the same tank, thus odd 17pdr turret/lower hull combos occurred.

For a British Hybrid Mk 1 75mm you are correct that the turrets are almost all as you indicate. Later HB turrets with loaders and thickened cheek were supplied but these were almost universally diverted to Firefly conversions. 33 AB was the largest user of the 75mm Hybrid but there were a number supplied to 8th AB (A Sherman III based Bde) late 44 as the Sherman III was getting hard to come by.