Manifold gasket fitted to all A series pre 1992 except Turbo which had a reinforced exhaust ports
GUG704063MG and SPI from 199. From 1991 on a new better gasket with reinforced exhaust ports and backing was fitted
GUG704053MG which is a superior gasket for performance use and easier to remove when replacing as it does not stick to head very easily.
For a gasket with larger port holes see
C-AHT381