Hi im new to the board. my name is tom. I have a 1986 Trans am with a 1994 lt1 and 4l60e,and currie ford 9inch rear end. I have a ton of mods done to my car. I am getting a horrible vibration over 4500 rpm when i have the throttle pinned. I dont know what it is it seems to be comming from the tranny tunnel. I have a steel driveshaft that is balanced, a new stock rubber tranny mount( poly one vibrates even worst), Every thing is brand new. I dont knwo what this vibration is has anyone had and problems like this or do they know who to fix it if so please let me know. HEre are a list of my mods. the car is only running 13.9 i think it should run a high 12 with all of this work. I think the knock sensor is picking up a false knock reading from the vibration and is retarding the timing big time.

k&n fipk
shift kit
granatelli maf
redz racing tranny clutchs
bbk throttle body
vigilante 2800 stall converter
high flow bellow
platnuim spark plugs
meziere electric water pump
accel wires
edelbrock headers
be cool aluminum radiator
flowmaster exhaust
B&M tranny cooler
removerd cat
hypertech ppIII "engine tuning not installed"
Miller racing lcas,
currie ford 9 inch rear Locker with 3:70 gears
lca relocation brackets
subframe connectors
miller racing torque arm
KYB adjustable shocks
spohn 3 inch steel drive shaft

I hope someone can help or someone knows someone who can

thanks
Tom