You understand the situation completely.
Mk2 cortina struts I have been told are Imperial and Escort/Starlet ones on the TCA are metric.
But with my rudemetry mathematics (SOH CAH TOA) and measurement I make the angle of the two tapers to be the same...
Shim stock is a boomer idea. Will be a cost effective fix, cheers for the suggestion.
The R&P is good, just small hold ups like this, I'm so close I can smell it.