RMS has a cool tire/speed/rpm calculator

[64DartGTinAZ]

Just found this handy calculator on their site:

https://www.reillymotorsports.com/store/pages.php?pageid=12

Here's a screenshot, so you can see what makes this one cool:

 

[Bad Sport]

Hmmm.....no 904 option for trans. What's up wit dat?

 

[1970Duster]

oooooooooooh something for me to play with!

 

[64DartGTinAZ]

Hmmm.....no 904 option for trans. What's up wit dat?

From reading this, it appears that the A904 and 727 had the same ratios:

http://www.allpar.com/mopar/torqueflite.html

 

[abodyjoe]

thats been around for a while. i have posted that in threads here quite a few times. its a great tool...