Always good input here. I'm setting up my 66 cutlass vert.,455,lunati 60802 cam,Qjet & TH400, 17" wheels,prob 26" high & looking at the best gear. Its not a DD but will be rolling to some events hr away,I have 2-12 bolt chevelle posi's,3.73 & 3.31 and kinda leaning 3.31 because of the TH400. I have another a-body BB build i'm running a ST10 in ,thought the 3.73 may be better in that setup. Is it spring yet!!

 

Someone had posted this handy calculator to help figure RPM's and gear ratios.


http://www.angelfire.com/fl/procrastination/rear.html

 

Yeah i found it,should have looked longer on the forum. Definitely will be running that 3.31 with a 3 speed. wow @2500 only gets me to 56mph,might have to build up my 2004R. Thanks