Brad... I got out this weekend,, the speedo is correct according to the Santa Fe,,50 mph, 1500 rpm, 60mph, 1700 rpm, 70mph, 2000 rpm, 4th gear locked up,, the overdrive really helps gettin those mpg's.
I also got out Cliffs book,, it is the early pontiac carbs that were great stock performers,, not Olds' oopps,,but any carb can be made to work well,,even looking through it this time was great..