Update:-

My final and official source of information is back from holiday:-

Apparently so long as your threaded attachments (on the suspension) are in safety you don't have to worry about the wheel base dimension - use it as a guide. Apparently there is no official tolerance for this dimension - neither for the dimension between the front wheels...

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!