i have a few questions regarding a front coilover conversion.

firstly what diameter are the 360 front shocks??
i have found 2 1/4" conversion kit with internal diameter of 50.28mm and 2 1/2" kit with I.D of 54.22mm.
which is best to go for??

also what spring lenght and and poundage is best for drift??
and what internal diameter spring do i need for each conversion kit?

i have found some very cheap 7" 400lbs/in springs with 63mm I.D but dont know if these are any good.

basically i need to know everything about what to use to do the coilover conversion.

thanks

any help would be appreciated! just need to know asap as car is off the road due to spring cup going deciding it didnt want to be apart of the car anymore!!!

2 1/4" wont go over the legs and 2 1/2 are a bit big really but can be used. There is no easy way to make usable coilovers with a decent amount of lowering on a 300.
When i built mine i had custom tubes all made up.
Spring wise you want to look at springs 220lb + and length depends entirely on where you weld the conversion kit.
Adam

thanks for the help adam, but i got a couple more questions.

will the 2 1/4" kit go over the legs with a little shaving from the grinder??

also if i bought the 2 1/2" kit do i just buy 2 1/2" internal diameter springs??

no and yes
Adam