Al
I believe that the choice depends on usage and vehicle weight in general cars weighing over 3000 #
could be quicker with the lower first gear of the turbo but the turbo weighs more and has more rotating weight so for the your car weight the glide will be as quick or quicker and more consistent it’s also a simpler transmission.
I would however use a converter modified with a bushing installed for a turbo input shaft they are stronger and have better fluid flow than the power glide design or a bushed pump to using a turbo input shaft.
(That my 2 cents worth and of course ...............I could be wrong
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