For bolt on fitting, you are in bad luck as that model accord has a very unique design and Honda never made any other car with similar design.
meaning - to fit bolt to bolt, you need engines from same accords
A16 - small single carb engine which you have.
A18 - single or dual carb
A20 - single carb or EFI
B20 - EFI - but this engine is extremely rare to see in Pakistan,
All the above engines only fit this model Accord. The transmissions are unique too and only fit this model accord. unlike D engines which were in Civics, Integras, CRX etc, or later F engines which were in Accords and Preludes.
If you pop open the bonnet you will notice the engine room is very narrow compared to later model civics or integras. Meaning if you want to shoehorn of those in there, you will need to cut a lot of metal which will weaken the car a lot.