Early A-series and Late A-series distributors differ. The changeover was 1974.
Prior to 1973 the distributors bolt on different. A12 engine after 1973 uses a different distributor. So A12 distributor from 1974-1995 fits an A15.
If you want to use 1967-1973 distributor in A15, I'm sure it will work, but don't have details of exactly what to do. Use the early plate probably.
If you want to use 1974-up A12/A13/A14/A15 distributor in early A12, click
Using Newer Distributor.
Transfer
