metric tools - kinda dumb question

[John Larson]

Not really.  GM switched to metric with the introduction of the completely
redesigned full size B chassis back in 1977.  My parents '79 Caprice was
half and half.  All body fasteners were metric, all engine fasteners were
SAE.  Though at the time, GM being GM, they used sizes that none of the
European or Japanese car companies used.  The large body fasteners were 16mm
and 18mm, which obviously I didn't have in my metric collection.

Bob

Actually, BMW and (especially)Volvo routinely use fasteners in 16 & 18mm
wrench sizes.  Weber carbs also use 16 & 18.  Japanese cars use 10, 12, 14,
& 17 mm a lot, and 19, 21 (lug nuts), and 22 here and there.  Not much 8mm,
though.  My 72 Vega (Yeah, I know, but I got the good one they made that
year!) had SAE fasteners but all the wrench sizes were ones I had in my
metric set.
John