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Originally Posted by nailhead425
Not true. The correct gears w/ a TH350 will generate better acceleration because the spacing between first and second gears is closer.
A 700 will pop you off the line faster, but unless you have a very strong low-end pull, it will fall flat on the 1-2 shift. The reason the 700 has a 3.06:1 first was to give the feeling of a strong engine, with one that had very little torque.
The mileage difference between his 350C (lockup) and a 700 aren't as great as you might believe. Plus, 700s are weak.
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not true.
Yes there is a more pronounced 1-2 rpm drop but it won't matter that much because you'll be so far ahead due to the stronger off the line. As for mileage---a 30% drop in rpms will give better mileage period. 1:1 to 0.70.
Lower rpms = better mileage.
Better tell GM to drop the 4 speed autos and go back the dark ages!
Early 700R4s were not that strong but after 87-88 they are. Besides if he's putting it behind a realtively stock engine there won't be any problems.