Throttle Bodys for your Mustang
I went with the Professional Products Polished 75mm Throttle Body

Here is what they say about the trottle bodys!

Note (1) For street legal applications the 1986-1993 throttle bodies must be used with a companion EGR plate. click here THE 1994 AND 1995 throttle bodies do not require an EGR plate.

Note (2) Early model throttle bodies include an OEM throttle position sensor.

Note (3) Use a 65mm throttle body on a stock manifold. The 70 mm model is ideal for most aftermarket manifolds, and the 75mm model will require minor porting on most aftermarket manifolds.

Note (4) Professional Products Throttle Bodies are 50 state legal when used on a 1986-1995 Ford Mustang with a 5.0L V-8.

Here is a sample image of the trottle body from a pre 94 Mustang