From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Numbered list of possible component modifications and parts.
| Identifier | ExFiles\Box 97\4\ scan0022 | |
| Date | 16th September 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}5/MH.{M. Huckerby}16.9.38. POSSIBLE. (1) Lower geared steering. (2) Roller follower F.89511. (3) Pin synchromesh. no cars. (4) Front damper valves ExS.827/8/9. (5) New exhaust system. (6) Cheap inlet valves. (7) Forged Con. Rods. (8) Klinger .030 thick gasket. (9) Vandervell Rocker bushes. (10) General oil filter. (11) Dixtampo rocker cover nuts. (12) Duprene springs under rocker cover nuts. (13) .4 Carbon crankshaft. (14) Radiator mounting SCD.659. O.K. (15) Mn. bronze starting handle bracket. (16) Olive joints in petrol pipe lines. (17) Cheaper petrol pump. (18) Flexible flywheel. (19) Vandervell main bearings. (20) Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||