@AkifJanjua: Many congrats on an excellent acquisition!
I think the cost of the dash(ing) could possibly be significantly higher as Toyota parts prices are setting new records with the borders apparently closed. I would rather opt for the original dash with the original 40 series AC fittings, but its all a matter of personal choice.
On the engine, I believe this BJ40 is a rare beast as it has a 2B engine which was turboed by somebody in Dubai. It would be nice to check the turbo pressure on there and playing with the settings and maybe add an intercooler....a rare 2B-T I believe.
And if you need any tips on how not to do a 40 series build-up you know who to ask 