t5 vibration. please help?

[blueflame]

i put in the t5 and had the flywheel ballanced and the car vibrated baddly, now i bought the new flywheel 28 oz 157 teeth 10 /12 clutch. and now the vibration has lessend bigtime only when i am at over 65mph and in 5th gear the car vibrates so bad i can't even see in the rear veiw mirroror hear anything but the vibration.

(1) so far, i have got a new driveshaft made and ballanced
(2)brandnew flywheel
(3) i got all 4 wheeles ballanced.

can someone please help me. i don't know what is wrong here.
thank you.

 

[mkk50]

i do kno that the 5.0 uses a 50oz external balance, are you running a 351 or 302?

 

[blueflame]

my motor is a 1969 351w and i am using a 28oz 157teeth 10 1/2 '' clutch. the first flywheel i had was 50oz and we had to get it ballanced (drilled)but the ballance was not perfect it vibrated , so now i got the correct centerforce flywheel and the vibration is not as it was with the ballance 50oz , now it vibrates when i am driving the car at about 50mph and above . i am looking at the ballanced flywheel and it has the raised part where the ballance is and the one i got from summit had no ballance anywhwere on it , the thing was just a flywheel with the holes and no ballance .
i really wanted to drive my car to Semi Valley the summer