A large quantity of engineering change requests exist and we have yet to check through these. It is likely that they contain substantial information about when and why the production specifications were altered which could explain a lot about the models we have today and the process by which they evolved to be durable and reliable. Some of these change requests would also have resulted in service bulletins so that changes could be retro-fitted to cars already sold.
Note some of the ECR numbers are marked on the drawing issue cards and in the master record books.
This is only a sample of the ECRs taken from the last index card drawer. This has not been done systematically yet.
| Number | comments | date | drawing |
| ECR246 | Insulated swage filler unit front RH/LR | 1970 | 77212026-7 |
| ECR1418 | Fitting instr drg ind front seat recline | 1970 | 77212071 |
| ECR1591 | Slide assy front seat | 1970 | 77212072-3 |
| ECR1746 | 77212563 | ||
| ECR2078 | Cover trim pad door | 1970 | 77212090-1 |
| ECR2410 | Spring case assy rear squab contoured | 1970 | 77212093 |
| ECR2520 | Spring case assy rear squab contoured | 1970 | 77212092 |
| ECR4217 | Trim pad rear qtr assy | 1971 | 77212316-7 |
| ECR4858 | Underbody sealing | 1971 | 77212200 |
| ECR5322 | Insulated swage filler unit front RH/LR | 1970 | 77212026-7 |
| ECR5667 | Spring case intalastic cushion rear seat | 1971 | 77212094 |
| ECR5670 | Tension spring flexolator platform | 1971 | 77212344 |
| ECR6036 | Trim pad rear qtr assy | 1972 | 77212202-3 |
| ECR6081 | Slide assy front seat | 1971 | 77212072-3 |
| ECR8106 | Mat rear floor | 1972 | 7212562 |
| ECR8767 | Mat rear floor | 1972 | 7212562 |
| ECR8861 | Glove box | 1973 | 77211887 etc. |
| ECR9031 | Control bonnet lock assy | 1973 | 77211890 |
| ECR10212 | Control bonnet lock assy | 1973 | 77211890 |
| ECR10358 | Spring case intalastic cushion rear seat | 1973 | 77212094 |
| ECR10532 | Bumper overrider rear | 1973 | 77211891 |
| ECR11313 | Assy backlight | 1973 | 77211941 etc. |
| ECR12515 | Housing glove box lock | 1974 | 77211974 |
| ECR13032 | Lock set | 1974 | 77211935 etc. |
| ECR13844 | Engine rear x/member assy | 1972 | 77211928-9 |
| ECR13844 | Assy panel spare wheel floor | 1975 | 77212674 |
| ECR13976 | Instr drg track fitting | 1975 | 77211934 |
| ECR14163 | Cover dash centre accel pedal linkage | 1975 | 77212783 |
| ECR14213 | Assy panel finisher mtg lock suppt | 1975 | 77212875 |
| ECR14368 | Bkt safety harness rear quarter | 1975 | 77212794-5 |
| ECR14494 | Lock set | 1975 | 77211935 |
| ECR14617 | Bumper overrider rear | 1975 | 77211891 |
| PCN15146 | Assy panel door inside | 1976 | 77212942-3 |
| ECR | |||
| ECR | |||
| ECR |