insurance on a track day spec s14a

Hi for the last 2 years i've been building my track day nissan 200sx s14a. it is that time to start the insurance reaserch as it is not long before it's finished. i'd be verry appreciated if anybody of sky could help me on this proffesionaly. few words about driver, i'm turning 30 in september and have 4 years NCB on my other car which i may or might not be transfering depending on the quote, no points or accidents of my fault 8 years european licence and swoped in 2007 into uk. now. car would be mainly used for track purpouse and verry little road driving a maximum of 500 miles a year.
the spec of the build:
nissan 200sx s14a 1999 year
engine
rebuilt forged and borred out engine
brian crower 264 inlet and exhaust cam shafts
rocker arm stoppers
turbo garrett 2871 + boost controller
850 sard fuel injectors
ecu remapped to accomodate modiffications, power output of around 350bhp.
tubbular exhaust manifold
front mount intercooler

chasis and interior
6 point bolt on cage
original interior removed
only two fixed bucket seats refited (1 with 6 point and 1 with 3 point harness)
omp steering wheel
ciolovers
adjustable suspension arms
poly bushes
fronf brake discs changed to 330mmferrodo ds2500 padds alround
17 inch rimms
road legal trach day tyres


please let me know what best can you do for me.??

all the best