Bit of an Update (without photos, again! Bhool gaya tha...)
Ok...so the deed is done.
The '67 has undergone a heart transplant, and now has a 300 bhp 1UZ-FE VVTi throbbing away at its core
I managed to make it to Islamabad in time for the first start, and by God is it looking beautiful...and sounding even better!
The 350 small block is going to get some TLC (replacing of the oil sump and tranny gaskets) and after a steam wash and some attention to the engine detailing, it's going to go straight into a crate for (indefinite) storage. Hopefully, it'll stay good for the time when I (or my son for that matter), decide to restore the car to stock.
Now...onto the 1UZ 
This is an absolutely brilliant powerplant, and after having used it in the '65 Impala, my mind really didn't wander any further beyond it, as a choice. If there is ANY other engine that offers THIS much bang for the buck, I'm certainly unaware of it. 300 horses, 300+ pound-feet of torque, an absolutely brilliant 5 speed auto transmission, and a blood-curdling exhaust note, ALL at a very decent price...make this a very decent engine indeed.
Due to the (much) lighter weight of the engine, the nose of the car seems to have risen by a bit, as well...which makes the stance even better. Very much a case of where the car seems to be 'accelerating" even when at dead halt.
Of course, the engine will be getting some more detailing bits, so as to make the innards of the engine bay nice and smexy. All of this, in the next couple of days to come, Insha Allah.
I find myself wondering...which will be the quicker car? With identical sizes, body weight, wheelbase, engines and transmissions, I suppose it'll boil down to the diffs and wheels. The '65 has Crown tubes front and rear (with all round disc brakes), while the '67 uses original diffs (and disc brakes up front). I have no idea how much of a difference tyre size will make. The '65 wears 16 inch wheels with 225/55/16 tyres, while the '67 wears 20 inch rims with meaty 295/40/20 rubber. It'll be interesting, getting the both of them in a straight line drag contest, for sure! 
More updates, and pictures to follow!