I did a 13.6 at pod with this conversion. If you launch it a lot your synchro rings wont last long, mine started crunching changing from 3rd down to 2nd but i didnt break any gears.
Price wise i was running stage 3 before and it cost me £1200 but i had the wasted spark done at the same time. I sold my old chip, greens, grp a coil and leads for £300 so it cost me £900.