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Old 01-06-2015, 11:47 AM   #30 (permalink)
Experienced UAW Mechanic
Join Date: Sep 2014
Location: Bear Lake
Posts: 363
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Thanked 73 Times in 63 Posts
I had a '78 Camaro with the 5" rear spoiler do 25 MPG at 65 MPH with the centrifugal advance not working, and a mystery Q-Jet. That was a 350, I swapped a junkyard 700R-4, it had a 3.08:1 axle, and I still have every detail to duplicate it, but the point is, hoping for 15 is a joke. It should already do that just as you got it.
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