internals, will I be able to run full throttle in 4th gear? If not, what is the advantage to installing the Vette upgrade?

 

I have one it firms up my shifts. Along with the Servo it made a noticable difference in every day driving especially in my WOT driving.

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TPI 305,
Gutted airboxes,
gutted MAF,
K&N filters,
Corvette Servo.
14.9@93mph

"Speed kills, wanna live forever, drive a Ford."

 

The valve that lets you hold 4th at near full throttle is availabe thru summit, I have it and it will NOT hold at full throttle - Tach shot up to red line when tried to downshift to 3rd near 140 or so when I pushed it to the floor. Otherwise this part works well, especially in conjunction with vette servo and mild shift kit


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91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 280 grind. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, ****ty stock converter
13.24@104