Phil at the end of the day you have build a big spec car so it should be timed imo.I am in the middle of building a decent spec series1 and know it aint going to be the fastest rst in the contry but if it performs well i will be very happy. Get it timed even if its for your benifit cause there are a lot of people wanting to see good times out of your car (me included) but there are some people out there that want to see you fail imo. So go get it timed and good luck