For straight bolt-in, your only options are to go for a 4K or 5K carbie motor. The only adjustment is that the headers sit 10mm higher than norm but some have managed to bend the existing headers to fit due to the rubber fittings.
An EFI upgrade would require extra components such as manifold, injectors + fuel rail, ECU, sensors etc.
2TG requires some mucking around + upgrade to T50 gearbox etc.
For more info, just check out Super Jamie's FAQ at the Old Corollas website.