He will get used to the steering slop.

Various devices of quite neat design will strengthen his arms.

However, if he really must have power steering, the obvious course is
to find an FJ40 at the wreckers that has it fitted and buy it and
transfer it.

Next option would be to see how much of a later model power steer
system could be adapted.

I suspect that the muscle training device will be much cheaper.

Its not difficult to fit as the last of the 40 series around 1984 had
power steering and disc brakes, the parts from the later cars should
just bolt on.
Mine was fine without ps until I fitted wider tyres which made it very
heavy to steer in 4WD, I changed back to standard wheels which is a lot
cheaper and easier than fitting ps.
A google search should find an aftermarket supplier.

Daryl

go 60 serie conversion its well worth the effort and money

dont know anyone in your arfea that can do it  i did all mine myself

you need a 55 series steering colum
75 series intermediate shaft
60 series steering box
75 series draglink/steering arm
75 or 60 series kingpin arms

if your running a 2f get the power steer pump and bracket from a 60 series

check www.outerlimits4x4.com  theres a few writeups on there about it