I hope you undertake this with full understanding that these cars are now in their mid 40s and their parts supply is scarce now, They were not very high quality cars to begin with and that will start showing very quickly if they are not cared for.
namely the wiring harnesses, they were very poor and thin gauge and while they worked good when new, they will require some reworking as they age. The added stress on them has been the spraying them with diesel fuel and oil to "shine" them up during a service wash.
The rest bits n pieces like the carburettor and the distributor would be shot too - almost all of them had rockershaft and rocker bushing wear due to using the wrong engine oil and not keeping the breathers open and not caring if the engine ran warm or cold. (the oil cap was the breather on these) and only a handful of owners actually wanted to spend money to keep them in good shape - the rest were "chalti ka naam gaadi, chahe engine se chalay ya gadhay se"
btw - where in the world did you find a G10 charade with a turbo engine? - they dont exist, the first turbo engine charade was the G11, it had a turbocharger pushing down a carburettor, the G100 turbo was EFI aka GTti or GTXX. The 102 was a sedan with a 1.3 litre, later models were not imported due to to restraints at that time and then the dollar/rupee parity started its slide.
I would never tell anyone to buy a swapped frankencar. Its a permanent headache to own. These cars can never be repaired and brought back to factory reliability. With frankencars the owner should be its whole dedicated mechanic/electrician/welder etc.
relying on shops to work on a frankencar is literally asking to be robbed.
