My P6B has the Dellow ( Australia ) conversion to W57 Toyota 5 speed, it’s a comprehensive kit that includes the bell housing and speedo cable W57 and W58 were used in a variety of Toyotas and are considered virtually indestructible
In New Zealand:
www.conversioncomp.co.nz Colin Dray, he’s in Te Awamutu
Here’s what you need, assuming you’re ditching the Automatic;
3500S pedal box with clutch master and slave cylinders, flexible hose
Manual flywheel ( Rover V8 ) clutch and pressure plate ( Toyota )
As the Toyota transmissions use a variety of shifter tops the one you need is 58cm measured from the flat of the gearbox to the center of the shifter, Colin will have it
Fab a crossmember, weld up the driveshaft and balance
Connect the speedo cable and reverse light switch
Bleed the clutch hydraulics and adjust, you may need to drill a hole in your transmission tunnel for checking/adding oil to your new gearbox
You’re done: W55, 57 58 and 59 all work with the Dellow bellhousing
Spendy, but everything else will break long before the transmission does, up to 300 horsepower is the accepted figure without compromising reliability
Hint: the Toyota gearbox “sandwich”/center plate appears aluminum in my picture; if you can, get the steel plate, just under where the figures “58” are. The steel sandwich/divider is easy to spot as these rust brown, and these transmissions are considered stronger than the aluminum spacer ones, with no difference in price
Good luck!
G