Quote:
Originally Posted by cleanfreak
I've got the same driveline in my 68 , been wanting to do thee same rear end swap. How much difference did it make , acceleration , fuel mileage , highway driveability , are you happy with it?
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after one week with the 3.08 I will say 3,73 are ok with speeds under 60 mph , the 3.08 are suited for what this truck is needed for ,acceleration is not as good but is very good also still climbs grades very well overall sweet spot now is 68-73 MPH verses 55-58 mph with 3.73 its the decel witch is much improved so you can glide along nicely when you take your foot of the pedal .
MPG is really the same but I am roughly traveling 12-15 MPH faster then before in the same RPM range. my average MPG is 18.8 MPG