[Eric in the Ozarks]

I've owned two Jaguars and a big Healy with the electric overdrive you mentioned but never owned an MG.
My first jaguar was a 1960 XK 150 S (late model with the gold head 3.8 E type engine.) I could get four or five levels of cackle with the little switch on the dash. Of course, a set of Midas mufflers contributed some to the music.
The MG tranny contains three little ball bearings that are spring loaded under the shifter cover. Opening this cover without care allows the balls to fly about the garage space and it can be troublesome to locate the little devils...

[Kenny Bunk]

.....three little ball bearings that are spring loaded under the shifter cover....

Happens to everyone ....once.

The MGB actually has a much better chassis than either the Healey or your 150. It is quite rigid and immensely strong. It does, OTOH, weigh in at around 3,000lbs!

I switched for a long while to Italian cars. My Alfa Giulietta weighed 1800 lbs, a FIAT 1500 Roadster about the same (same designer as the MGB) and they were a whole lot livelier than an MGB. Of course, with that much less metal, they rusted out in the blink of an eye in New England. The best of that early lot IMHO ... the 71-73 FIAT 124 Roadsters. Cheap, light, fast, reasonably strong. The Coupe version is definitely one of the best cheap sports cars ever made. After 1973, sports cars died. Heavy bumpers, reinforcements, pollution controls, etc etc. Jimmied out of existence by that dippy airbag broad Joan Claybrook. I hope she was run over by a 1949 Ford with bad rings.)