And early trooper and some impulses had them but with EFI.
I dont know any way to tell the difference.
There is only one difference, the G200 from the impulse with EFI had higher compression.
Oh and another, electronic ignition. If its got a points dizzy its earlier or the one out of the G180Z that should be in your luv is in it.
0.9mm gap for points
1.1mm gap if its got electronic ignition.
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Current project, 1979 KB Isuzu Ute.
Daily driver, '86 Rodeo Spacecab.
Chasing parts for Isuzu Impulse.