The Dapol Mogul can't be used for 5336 because it has the earlier form of motion plate, and it can't be used for 7333 and 7337 as they were fitted with side-window cabs and extended frames. The rest of your list seems ok. As far as I know, Dapol is planning to make available inside- and outside-piped versions as part of its initial offering.
You would therefore need pics of your chosen locos to see which were fitted with inside or outside pipes in your chosen timescale. Although boiler-swapping was as regular as on any other GWR class, I get the impression that cylinder-swapping was extremely rare. Boiler swapping with affect the presence of a high or low safety valve cover - Dapol seem to be offering both,
You'll also need to check your chosen locos have the high line of washout plugs on the firebox sides.
As far as I can tell, none of your chosen locos were lined post-1956.