[Pampered-Z]

Are you just asking for knowledge or are you planning on changing trans for a reason?

The OD trans are good for most street cars and for adding some highway gas milage, but will not support the big power a Turbo350 or 400 will. From what I've seen a well built 700 also cost more then a 350/400 trans.

Once you're making big power and hooking hard you will want a TH trans which would have stronger internals and case. "I Think" most use TH350 in place of a 400 on small blocks mostly becuase they can withstand the power and cost less then the 400, but someone can correct me if I'm wrong?

personally I look at glides as track trans. Those I know that run glides are really pure track cars and do so because with it higher first gear to calm down a car (wheelie prone), consistancy, or are in lighter cars. I don't know anyone running a glide in a heavy car for other reasons?

One other option is to use a TH trans and a external OD unit such as a gear vendor. This allows you to use 350/400 trans and still have OD. The down side is your adding weigth to the car and cost and another stress point for failure into your drive train. But I've seen it done.

I based this about a street type car, where crusing around 2,000 RPMs on the highway is as important as low ETs. If you build a car for racing then you're going to build the gearing and suspension, trans, convertor etc. into the total package and give that more importance over driving down the highway at 3,000RPMs.