what can be done to lower 60ft time?

I must have been drunk when I started this thread. I have no recollection of doing it. lol (Although I do vaguely recall thinking I might ask you guys for help)

Anyway, that aside, here's my set up as it stands.

I'm running a manual trans, with a three point nine to one diff, with a home made spring loaded locker center. (Kinda like a poor mans cone type lsd) With basically standard leaf spring rear end.
The front end has been lowered, so the car isn't level (It used to be lowered front and rear, but I took out the flattened out rear leaves and replaced them with stock items as they couldn't put any power to the ground at all.)

ATM I'm doing a modest burnout to warm up the tires, and then I try to launch as hard as I can without shocking the tyres and losing grip completely. (I don't alway succeed at that) The tyres I ran at the last meeting were a well used pair of street performance dunlops. Although they didn't offer any improvement over the cheap nasty asian 205/60s that I ran proir to that.
I'm sure I read on hear somewhere that every X tenths off the 60ft, was worth Y tenths off the total ET. However my ET seems to only differ by the same amount that my 60ft varys by.
Last meet was a cold day (Like around 10*C) and the track wasn't really grippy. I managed to run [email protected]. My PB in this car is 14.1@96, but that was on one of those freak days when the wind was blowing the right way, and the track was freakishly good.

Anyways, I've set up a nitrous kit on my engine to try and bring down my ET/raise my trap speed. BUt I feel like it'll be a waste of money (a 10lb bottle fill costs 250 bucks here) if I'm not getting the best 60ft 1st.


Since starting this thread (and since I didn't know I'd even started it) I got a bit of advise from a bloke at another forum.
He suggested,
Raise the front up so the car sits level. (no brainer really)
Wder tyres. (I've got a pair of 245s lined up)
Leave the spare tyre in, and replace the air with water. (Try get more weight over the rear wheels)
I've also found a new diff head which is welded up, and is 4.375:1. A freind took a vid of my last run, and while I was doing my burnout, I got the see the spring loaded locker diff unlock, and go open. So a locker should help things too.