I agree with Rob, Something in the 260 advertised duration,218-228 @.050" range.
Ive been looking at the Hughes Engines cams, The 19/23 looks like a nice stock upgrade, the 23/28 and 28/32 would work well also if you ran a little more gear.
when I redo the rear in a year or 2(just gonna beef up the 8.25 with new parts I had thought of going with the next step up 3.55's thats what I had in the Roadrunner they were decent gears fpr mostly just driving around..dont want to go much more than that though.