How does this 360 build sound?

JL, the 190's are domed and are to much for the street IF you use a small cam. Note that the cam used id the XE284H with 4.56 gears.

Is this the direction of the build?

I have ran the 107's. They will come around 9.8-1, which is high for pump gas, IF, again, the cam is small.

If the cam is to big for the converter and gear, then yes, it'll be crappy outta the hole. That Mopar cam @ 244 is large enuff for 4.10's and a 3000 rpm converter.

You can run a taler tire (How tall I'm not sure) via use of a 70's series tire instead of a 60 series tire. Measure the avialable width and run it in a 70 sries.

For tire diamantions, visit the manufactures web site. BFGoodrich will list not only the metric size, but the overall diameter, and width of the tire in inchs.