My Uncle used to have one exactly like this, a '75 model in Islamabad in the late '90s, LHM 7798 plate.
These cars were imported brand new as Escort Cars for Zulfikar Bhutto back in 1974/5. I think around 15 or so were ordered, of which maybe 6-7 still running in Karachi, Lahore and my Uncle's one in Islamabad has been sold off since, don't know where it's gone.
Unfortunately, that one had a diesel engine (1.5 Landcruiser 4500cc turbo diesels) installed in it plus a 5-speed manual box from a later Prado I think. Not very smooth and certainly too slow.
Gotta keep this original bro, even though it is a pain to source the parts. Nice ride. Good luck with the resto!