Personally I would get 3.73's. If you are not going to get a sticky tire then unless you are one hell of a driver you are going to have a lot of trouble launching.
When I had 4.10's and stock tires I couldnt floor it off the launch or else I would so sideways. Id spin all the way through 1st then chirp 2nd. Now with my nitto dr's I dont spin AT ALL. I can rev it up to around 1500 then floor it and zero spin. Instead of chirping my tires grip and my car gets thrown forward. I say get the 4.10's then when you get some more money get the nitto dr's, youll love em!
When I had 4.10's and stock tires I couldnt floor it off the launch or else I would so sideways. Id spin all the way through 1st then chirp 2nd. Now with my nitto dr's I dont spin AT ALL. I can rev it up to around 1500 then floor it and zero spin. Instead of chirping my tires grip and my car gets thrown forward. I say get the 4.10's then when you get some more money get the nitto dr's, youll love em!
Seriously, you arent going to grip traction on a street tire even with 3.73's at the track. When I say "grip traction", I mean perfectly with no tire spin. It will take seriously sticky DR's or slicks to do that. Therefore, get the 4.10's and just save up for the sticky tires.
4:10's, dude, I just ordered mine 5 minutes ago, and feel alot better now. I also got a slushbox. If you order, go through mustangtuning.com. The dude was cool and very honest, made me feel like I was a king.....I am a king....yes milord.....
go with both, you won't be sorry. get the gears now and save up for the DRs if you have to. will be hard to hook up if you give it a little too much gas and you don't have DRs.
On the '01 GT, I just put siped Toyos on the Bullitt rims. They hook pretty well and are especially effective on turns. I like the sleeper launch on the '65 so I roll out at around 3,000 RPM and then nail it. Sure surprises lots of folks. I always line up a few feet behind them so they can't hear the Flows all that well. Besides being a little low, the sound is the only hint that it isn't stock. It smokes the tires in each gear (not stock engine and I put in a T5 with a 3.35 1st, and 3:40 posi rear when I did the V8 conversion). If I just nailed it from a stop is would just sit and spin all day. I guess I'd go for tires before gears. But that's just me. Plus you're going to do tires anyway right? Try a step at a time until you are happy with what you have. Kinda fun that way.....
another vote for mustangtuning.com! these guys rock, i ordered some stuff like 2 weeks ago on friday and had it monday! everything was perfect. ill be ordering 4.10's from them soon when I can find a shop that won't completely rape me on install cost.