It sounds like what you want is the above. I'm not sure what your cam specs are and stated rpm powerband, but for a street car your torque converter should stall at the beginning of your powerband (Minimum). So if powerband is 2000 -5500, then 1800/2200 stall is your minimum. If you were after max performance, then the converter you have would be a good choice. The tire size you have is very short, that's also a big contributor to your gear choice. The difference, all things being equal, between 3.55's and 3.70's is only a few hundred rpms. You can get rpm calculators for given mph/tire size/gear ratio online, just do a search. They don't factor in torque converter slippage,but will give you a good idea of what you can expect for your combination. I currently run a 4.11 gear, 904 with a stock type stall (1800) and a 26" tall tire (295/50/15) and turn ~3000 rpm at 60 mph. It's all a compromise, how much performance do you want vs. how much rpm you're willing to turn? Of course, a 700R or TH200-R4 with 3.70 gear would be optimal, but that's an expensive route and we work with what we have to work with.