If you have a B20A with an A cam it will be smooth and quiet and very happy to punt around at modest speeds. With overdrive it will still be happy at motorway speeds due to the low back axle ratio. About 90bhp and torquey.
My previous 121 4 door had a B18A with Stromberg. 4.10 axle and OD. It was smoother and quieter at 75 mph than my Estate with B18B, 4.56 and OD. Food for thought.
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