What spark plugs?

[Gsouthee]

It seems I have a 688D7 12 engine in my 1982 4gtl. Question what is difference in engines re the spark plugs, as my pocket mechanic book seems to suggest the plugs are different, is correct. Cheers Gary

 

[Andy McGhee]

For the 1108cc engines:
688 D7/12 (9.5:1 compression ratio): Champion L92Y or equivalent.
C1E J7/18 (8.3:1 - these engines were made to run on 'Essence' (2-star) rather than 'Super', and are usually found in F6 vans): Champion L87Y or equivalent.

This is a handy site:
https://www.sparkplug-crossreference.com/