I don't like the idea of the rods sort of wandering around, so reasonable side clearance is a good idea.
I'm not sure how the oil is flung off, and tight clearance may cause an oil stream to be aimed somewhere else, but the volume shouldn't change.
This whole topic began (AFAIK) a few years ago with use of aftermarket rods on reground Chrysler RB cranks.
Eagle etc. advertised the rods as Chrysler, but they're .990" wide (made from BBC cores) and there was a lot of freaking out because of the extra side clearance, but the math was sorted out slowly.
The Jag rod is probably well made (QC, metallurgy) since the car was expensive when brought out (1948?), but how many times can it be rebuilt before it gives up.
That's also an engine famous for exploding 500 RPM above the redline, but IDK what part gives up.
