Nah. I wanted a truck. But thanks!
I owned a 1990 2L-TII Hilux Surf 5 speed for 5 years and recently spent a month living out of an auto HDJ81. Surf was stock on 31's, HDJ was lifted on 33's and pretty heavy.
Surf had 3" exhaust and emissions delete/boost compensator tweak. It was noticeably slow, but if I drove it hard it kept up with traffic fine. Aforementioned tweaks made a big difference. Used it for 900km round-trip highway journeys when I was in college, would cruise 120kph++ pretty easy on the flatter sections, down to 100 or so on some of the grades, mostly due to EGTs rather than power. An intercooler would have helped a lot, you could tell it was heat-soaking. No matter how I drove it I struggled to get less than 23mpg US. Highway stuff was usually 25-28mpg.
The HDJ81 accelerated and maintained speed in "normal" driving almost like a "normal" car, I found (I.E. the slowness wasn't noticeable). But on hard acceleration I found the HDJ not particularly impressive and it really didn't seem to like rpms over 2800. Low end torque was miles ahead of the 2L-T, which is where most time is spent during "normal" driving. You had to wring the Surf out to get it going.
If you stuck a turbo setup from a 2L Surf on a 3L Hilux, intercooled it and gave it an educated tickle I'm sure it would do your 70mph highway duties just fine. You'd have to go down the cylinder head rabbit hole, though.