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#1
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I have a 79 727 from a van and an 89 904 from a 5th ave witch one would be better for 80% street 20% drag vehicle 400+ ci small block 3400 lb. 10 inch slicks will be used cost and H.P. loss are concerns
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#2
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The 727. Don't use lock up TF's in a performance car, they were not meant for that.
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#3
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Build-up costs of either trans should be similar. All else being equal, the 904 will be about .15 faster in ET. Use a cooler either way.
Of course the 727 is stronger With a 904 you can get a 2.71 low gear for probably under $200, unless you know what to look for at the salvage yard. (Which I'm not sure of.) However, it may be more difficult to control traction with the big small block. |
#4
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The 904 you have should already have the 2.74 first gear.
Ultimately, the 727 will most likely live longer, but it is heavier and will cost you some ET. I ran a 904 in my drag car and never had a failure because of the smaller size. Only failure was because of my own stupidity. |
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