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The Ultra bell has a few issues you might or might not be able to live with. First, I believe it is limited in the size of torque converter it can hold; it is smaller internally than a stock bell.
The 11" converter is in common use anyway, not a big issue.
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Second, it attaches to the trans via the pump bolts. These bolts are small (5/16" diameter), long, and were never intended to anything but attach the pump to the case. If you look at the case itself, several of the threaded bosses are very minimal - there's not much meat around them.
Remember the Clutchflite used behind nitro funny cars? Never heard of a pump bolt failure.
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Also, as a race piece, I do not believe it offers all of the factory bosses. So if you have a column shifter or kickdown linkage you might be forced to rework your linkage which is seldom pretty.
This is a legitimate issue but cable-operated shifters and TP are popular even with stock 727 installations.
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