Swapping 8 3/4 centers, questions

[rp23g7]

I couldnt edit my original post

So i took the Duster 8 3/4 out, it looks like its in pretty good shape, no play in anything. Its a 2:76 Sure Grip.

Before is swap it to the Bee, i was thinking if it would really be worth swapping it if the Bee has a 2:93, or 3:23. Sure i would loaf along on the freeway, but wouldnt it be gutless of the line? The car is not raced.

Maybe you racers can help figure out the ratio, i may just do the seals and bearing depending on what you guys think. The tires on the car are 28x10x15's

I marked the tire at the bead, and marked the drive shaft yoke, and rolled the car on the ground. the tire went around once, and the drive shaft went around 4 times. Anyone know what that would make the rear end?

 

[1970Duster]

The higher the rear ratio (numerically) the faster off the line you'll be and a slower top end speed.
The lower the rear ratio (numerically) the slower off the line you'll be and a higher top end speed.
This applies to any rear end/center section
Gotta ask, what's your center section 741,742,489?

 

[rp23g7]

the Duster has the 742, the Bee has a 741, guess i will find out tomorrow what ratio it is

 

[1970Duster]

the Duster has the 742, the Bee has a 741, guess i will find out tomorrow what ratio it is

One other thing youll need to look at is the if the yokes are the same size.

 

[berlins]

if tire went around once to 4 turns of drive shaft it would have to be 3.91 or 4.11s
(I forget Mopar gearing ratios) I have 3.23s so my driveshaft goes around a little more
than 3 turns for 1 tire.(I put it up on jacks once just to check)

 

[LXguy]

A 28" tire and a 2.7x gear is going to be pretty lazy off the line. What motor?

 

[rp23g7]

a 28" tire and a 2.7x gear is going to be pretty lazy off the line. What motor?

440

 

[rp23g7]

if tire went around once to 4 turns of drive shaft it would have to be 3.91 or 4.11s
(I forget Mopar gearing ratios) I have 3.23s so my driveshaft goes around a little more
than 3 turns for 1 tire.(I put it up on jacks once just to check)

Unless someone change the gears already, this is a clone bee, started life as a coronet 440 with a 318, probably came with a 2:76, 2:93 or a 3:23, I will take the other center section out tomorrow