3.55 too much?

[BullittStangV8]

i have a top loader 4 speed. What gears do you guys suggest? im between 3.55 and 2.35's as well. the chart posted only was for 3spds. i was wondering if anyone knows what these gears rpms will be at either 60 or 70 mph.
mike
p.s how hard/what is needed to calibrate the speedo?

 

[12sec67]

i have a top loader 4 speed. What gears do you guys suggest? im between 3.55 and 2.35's as well. the chart posted only was for 3spds. i was wondering if anyone knows what these gears rpms will be at either 60 or 70 mph.
mike
p.s how hard/what is needed to calibrate the speedo?

hey mike that final drive ratio for both tranny's are 1:1 so having 3.55 would be the same overall rpm's as a 3 speed as to a 4sp with the same gears.

with that little in gear change it is very easy, justswap out the speedo gear for the correct one with a different tooth number.

3.55's for everyday cruiser and 3.80's for drag