If your car was MPFI I'd say go for it straight away. They certainly pack more of a punch than the non-turbo motors and the conversion is almost plug_n_play, very little conversion work to do.
Given you are running carby most people have mentioned the wiring job (really the main part of the conversion) has almost as much work involved as fitting an EJ generation motor.
This is true but there is a way to avoid all the complicated splicing and cutting down of harnesses usually involved
Your car is an L series, and so is the donor car.
You could quite easily take the ENTIRE wiring harness from the donor car and fit it to yours.
It's a bit of work transferring it over but you don't really have to think about much, just make sure you get all of it and don't miss all the earths.
Really just depends how much time you have. It would be easy but probably just take a bit of time.
You'd want to transfer across the EFI fuel tank, pump and fuel lines from the donor car while you are at it.
As an EJ boy I really must advise you to go for an EJ conversion instead.
An EJ22 produces more power than an EA82turbo (both in stock form) and is a far better, more reliable and technologically advanced motor.
Have a read up of the many EJ conversion threads on the forum including the sticky one by Tim in the Conversions thread. I don't think anyone regrets going EJ once it's done
