Lost power under load

Sounds like either your fuel pump and or fuel filter is bad. Change fuel filter first and try the hill. If it still bogs down sounds like fuel pump is almost ready to die. Get a pressure test run on fuel pump.

If above does not work then it maybe maybe your catalytic converter. Have it checked. Good luck

Usually a sign of a fuel problem, either too much or too little.
Too much could be several problems including a clogged air filter, too little could be a weak fuel pump or other issue.
A mechanic would check fuel pressure and air flow first.

on flat ground? 60mph.
my guess, is, its running lean.
use a scan tool (real no useless code readers)
and look for closed loopstatus at 60mph. and idle.
if its not going to CL, status, that IS the top symptoms.
and LTFT, (long term fuel trim)
+5% Is typical, +40% is lean.

lean is caused by many things, sorry more tests.
one, is low fuel pressure.

(or under reported, air , for any reasons. MAP or MAF based engines)
under reported, caused, lean.
in closed loop this is corrected.
at wide open throttle on hill if power is low, that might be low fuel pressures , so does it do that?

IT IS YOUR COIL PACK,THERE ARE 3 OF THEM,REPLACE THE WHOLE UNIT WITH NEW AND NEW PLUGS AND WIRES.YOU MIGHT ONLY NEED ONE COIL PACK,EACH GOES TO 2 CYLINDERS,IF THEY ARENT FIRING PROPERLY IT WILL BOG DOWN,IT SHOULD CRUISE THEY ARE NICE CARS,I HAD ONE.

Check the fuel pump output. Some will work but not have enough output for the instances you describe. Find a place that can test the fuel pump pressure.

when a tank is empty there is no fuel for the pump and the system runs low on fuel pressure Going up hill the fuel runs away from the pick up line and the pump sucks air
After filling it takes a while to empty the air out of the system to allow full pressure again. It is an extremely costly practice to run so low on fuel as it may lead to a pump replacement

A leaking exhaust manifold could make a ticking noise. So could a lifter or valve. The exhaust noise would be louder under load.
If the carb is running too lean, or you have a vac leak, the lean fuel mixture could make the exhaust leak worse, and cause the loss of power.

Have you replaced the fuel filter?

Coils breaking down under a load,eg,going up hill and over 60mph. Also check EGR and check fuel pressure,with gauge, while driving.

this is a 1.6ltr or sumthing aye? there is not enough power to weight the engine is way to small to do anything real