Bullet dodged

I owned a Freestone and Webb-bodied Bentley 31/2 Litre and my wallet is so grateful I bought it after restoration (Epic Restoration, June 2018). Rather than change the back axle I had a Laycock-j overdrive fitted into the transmission (BDC kit). Pressing the gearknob engaged it via a microswitch hidden under the gearlever gaiter. With a 1.27 ratio this gave 70mph at 2200rpm and effortless long-distance cruising in modern traffic.