great pics of bathurst
the other hardtop you are unsure of is the john goss 75 car
and although it doesn't matter because it is a holden
l34 means the bathurst type torana - similar to a gt
l16 was a 4 cyl. l20 was a 6 - i think the 202
and l31 was a 308
i am not sure what the 253 designation was
most slr5000's were l31's - there was only a handful of examples were genuine l34's
and no torana had a 350 from factory - they had 4 cyl, 6 cyl and the 253 and 308 v8