what rear end ratio for 327/Powerglide

[likaroc13]

i'm just brainstorming for the near future...my '66 has a 327/Powerglide combo...i'm leaning toward continuing to run the Powerglide for a while, then switch to the 700R4 later down the road...i plan to switch to 5-lug front & rear...my question is, what gear ratio would be best for this motor/trans combo? i would like to add that i plan on static dropping the truck significantly & running a skinny/fat tire combo...wheels will be either 15x7 or 15x8 front, & 15x8 or 15x10 rear...currently i just drive around town, but i'd like to be able to do some highway cruising in the future...so, let me know what you think/suggest....thanks