various things to do..
it's not that much expensive to get it converted.
it's just a hassle
it's better if u get a Vti to start off with
This is due to the reason
1.Wiring is already VTEC equipped
2.Has rear disc brakes to start off with
3.Already Efi

but downside is
That it cost quite abit and not many people are willing to let go of their Vti for less than 5-6K hence it is rare to find these

But on the other hand with Gl you area talking about
1. they are cheap
2. many available
3. power windows and such from factory

But downside is
1.You need to do the Efi conversion
(parts will cost around 300 bucks for fuel tank+pump and Efi lines+ rear wiring loom for the fuel tank) BUT! labour is painfull doing it DIY and itll cost quite abit to get some1 to do it
2.Wiring harness has to be changed (not the dash but the firewall harness)

Anyway thats the basic stuff
if u need help
pm me and we shall chat more