A pretty engine with a Red cover over the top.
A beams or a 4thgen 3S-GE redtop, came on our late spec ST202 SS-II & SS-III from 97-99 (RHD only btw), one of the first Toyota engines to feature VVTI - which is continuous variable valve, this replaced Toyota's old version which was VVT - only on or off. As with all 3S-GE's, a great powerful NA engine. USA members sometimes refer it, the engine which they should have had factory rather than the 7A or 5S.
Our 3S-GE & beams thread- good reading.
How much depends on:
you just get the engine
engine & gearbox
1/2 cut < recommended, as you get everything needed -the white rev gauge. plus more. If its a SS-III you get the twin piston brakes, Helical LSD, and superstrut suspension.
Also depends on shipping to yourself & whom you sourced it from.
How hard is the swap? How skilful, how much mechanical experience and what tools do you have?
Since your Celica is a ST204, there is no difference with the engine mounts. In our project section you can see the top sticky thread, which has info about members projects.
Good threads to read about this swap:
richee3
njccmd2002
hurley97
^ as they are LHD like yourself
ricochet1490 - RHD converted
S8S8 RHD factory
Also listen into our
6GC podcast as it has good notes & info if you're looking at swapping.
Is it worth it? Most (if not all) people who swap love it. Although it is difficult & expensive to get more power out of it due to the short production line run of them & lack of aftermarket parts available.
Good luck.