Hi! New to the sub, sorry.

Have a tastefully modded 3.8 manual that I love to death. I installed all the new parts listed above and am 98% sure they're installed correctly. All a little more than stock parts, nothing fancy.

Shifts fine with the car off, goes in every gear, smooth as crisco. Crank it up and you gotta force in first and reverse, and when you let up the clutch pedal then starts all the shaking it comes from all angles. There's some rattling too. It wants to die out and take off without me pressing the gas, like more than normal, Until I give it a little gas to about 2000 rpm. And once I get going, she's running fine. Only taps of vibrations between gears. You can feel it in pedal and shifter.

All starting places, suggestions and bad news are welcome. And if you wanna come to Alabama and buy a mustang, please feel free to pm me. THANKS!

UPDATE: the more I play with the firewall adjuster, the shifting is easier and the vibration is way down but it's still doing it all, just more mild. Any hints?