Hi guys i need some advice and opinions on the following issue:

im looking at preparing a cl9 for track and at the moment i am unfortunately stuck with AT transmission. Due to the longer gear ratios of the CL9 i am thinking of changing the transmission to one with shorter gear ratios but i do not know which transmission gearbox will be suited for the K24 engine. I also want a gearbox with an LSD. Any opinions on which gearbox to use? Or should i just use a CL9 manual gearbox and add flywheel + clutch and LSD? but which LSD should i use?

So my 2 options at the moment are:

1) Keep current car and change the transmision (im aware that there is a lot of labour involved and my budget will be no more than $3000-4000)

2) Purchase a manual cl9 - if i go this route, will it involve changing the whole gearbox or can i get away with just changing the internals?

Open to any opinions/advice thx

and any thing i should consider to prepare a race-car cl9 for track? so far have injen intake, toda headers + hiflow cat (running stock catback), suspension mods include coilovers, front strut, and rear sway bar.