I just got back from a car show up in Chillicothe, Missouri and it was very cool lost of very very very nice mustangs. I saw another GT/CS there it originaly had a 390 but the guy ripped it out and threw in a boss 302...
it was still a good looker though. P.S. i lost to a 2004 mustang that was bone stock...ew

That's cool - except for the 2004 mustang lost in his dust sort of thing...but maybe your car wasn't warmed up?

I'm still thinking your vehicle is having a bit more trouble than just needing to be "warmed up". I consulted with a mechanic earlier, we were talking about my car when I suggested he give me advice on your problem.

Said it sounded unusual, and probably was more than just "warming up" - you might want to give it an all around tune up, and if your still finding troubles consult a mechanic who can listen to your car and offer you some free advice.

Goodluck, thanks for sharing the car show stories!

-Brad

yea Ill get pics uploaded later some nice cars.

My CS used to do this too, I put on a smaller carb; 650 Holley 4-barrel instead of the 750 my hubby put on in high school, and had my transmission adjusted.
It still needs 2 or 3 minutes to warm up, but no longer dies when I put it in gear.