Late 70's/early 80's 911's had to drop the engine to change the spark plugs. Dad's work neighbor Porsche shop was printing money left, right, and center.
I would use a 2x4 and the belt from my pants to drop the engine just enough to change them. Amen for Mg and Al engine blocks, boohoo over heating them :O
Back yard swapped many 911s, 914s and VW Bugs, Vanagons, etc. Give me a air cooled flat.
Or drill through the firewall, which is why many of those cars are no longer with us. Beautiful cars, at least the Pontiac version, but now almost impossible to source.
And you'll never find one with good interior parts.