I have the TFS TW 170's on my 347 and at 1st they were just a cheap option till I could get better heads, but they seem to be working out well for my current combo. My ET's arent that good but the car traps nearly 120 mph in the 1/4, but only 90-91 in the 1/8 because I cant begin to get it to hook up on DR's. Once I get the 1/8 to where it should be it should be mid 120's in the 1/4.
A guy on the corral has a 347, TW 170 heads, TFS 3 cam, Victor 5.0 intake, 90mm TB, 1 3/4 LTs with 3 inch exhaust. Best so far is a 10.67 at 127 with a 1.43 at 3100 lbs. For as cheap as a set of 170's can be bought, along with your modest goals sounds like a good choice.