Heya James, i have some A series engine specs that u asked for.

Standard bore for A10/12/13 is 73mm
Standard bore for A14/15 is 76mm
Standard bore for A12A is 75mm

A10 Crank is 59mm
A12/A12A crank is 70mm
A13/14 crank is 77mm
A15 crank is 82mm

A10 Conrod is 117mm
A12/A12A conrod is 121.5mm
A13/14/15 conrod is 133mm

CC for A10 is 987.8cc
CC for A12 is 1172cc
CC for A12A is 1237cc
CC for A13 is 1289cc
CC for A14 is 1397cc
CC for A15 is 1488cc

Block height for A12/A12A is 189.1mm
Block height for A13/14/15 is 204.1mm

CC for GX type head is 29cc
CC for A12 type head is 27.5cc

Max bore for A13/14/15 is 79.5 - 140thou over
Max CC for an A series 1628cc using A15 crank and 140thou over.

As u can see i've done my homwork on the A series! But i dont have a clue about the E15 engine but could be worth looking up for future projects!! Hope this helps for what
u are looking for.

Scott
Davo