Not Sure what to do. Mod 2000 GT or more for 64

[Mercury]

Hello Everyone.

I'm stuck between a rock and a hard place. My Tax returns are actually substantial this year, and my bonus check is going to be decent also. What I cant make up my mind about is I'm not sure what to do with the money. Use it for Gears (3:73) and Flow Master 40 series for my 2000 GT, or use it to buy a T5 and some Shelby Tri-Ys for my 64 1/2. I want to put a manual in my old stang so bad, and new exhaust for it, but people at the Local Street racers hang out either laugh at my old car and wont race it(because it looks stock as hell, but its not) or are scared and wont race it.

The engine in the old Stang is a powerhouse, but the C4, and rear gears just dont do it justice, well neither does the non advancing Vacumm Advance. Got replace that. I was thinking if I put a manual behind it, I'm going to want posi-traction to help it get traction that it so desperatly needs, and some gears to pep up accerleration.

Or, I could get some pullies and gears for my new GT. Or Pullies and Throttle Body..ARGHHHHHH Cant make up my mind...Help. Any advice would be great....