Sir
Again, I would advise you to run the car on petrol, if engine is fine.
Otherwise, change the engine to 4E FE, it would be a bolt on fit to your transmission /clutch , engine mounts / front brakes and radiator.
7AFE is a brilliant engine, but it would cost you a fortune, It was also a narrow valve angle long stroke engine never meant to be fitted in a Japanese chassis, you have to buy better engine mounts, possibly also have to change the gearbox, if not only clutch, change front shocks, better radiator and bigger front discs, if you want to swap properly.
Exhaust will be also changed, ECU and wiring, battery.
C51 transmission can only coup with 4EFE for everything else you have to go for C52 or C56.
4AFE will give you not more then 10Km in city if driven properly, 7AFE would definitely consume more.
any 20V, silver balck or red top or supercharged 4AGZE would cost you an arm and a leg, fuel consumption would also be on the higher side, not more then 6-8 km in city .
If not properly installed, it would be a headache.
I had a SWAP on my uncle's 93 Corolla after mounting a 4AFE with complete tranny and spending nearly 100K, I was really frustrated when a 6th gen Exi Civic outclassed my car in both performance and fuel economy.
That is why I am advising you to buy a 96 E100 Indus Gli in excellent condition for 650K-700K, or Japanese E100 for 800K, though if I were you I would eye on a well kept 9th Gen E120 Se Saloon with 3ZZFE driven on petrol, AUTO with around 50K on odometer or a 2003 GLI in same condition.
Else, if you had made up your mind for swap, prepare your budget wisely and patiently.
regards