Quote:
Originally Posted by ab positive bulldogs
Be careful I have a stock 351E with the Dana 60 and 4.10 gears I installed a tach to make sure I am not hitting redline on the freeway and I am at 3100RPM at about 45mph with 33" tires
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There definitely something wrong with your figures. Though it's been a quite sometime I do remember my 68 K2500 with 4.56 and stock 33 inch tire would run somewhere between 2200 to 2500 rpms at 55mph.