I guess most people wouldn't be happy limited to 65 MPH at about 3500 RPM which is what I see with 275/60R15s and 4.10s. A streetable 4200+ converter might feel a bit "slushy" on the street, but doesn't affect steady-throttle cruise RPM and certainly helps the 60-ft times when the chassis is dialed in.

It's all a tradeoff between what you're OK with while driving on the street vs what you want to see on your ET slip. I lean heavily towards the ET slip at the expense of what some people aren't willing to give up putting around on the street.

My requirements don't represent anyone else's. I mention this only because I see people set performance expectations that aren't consistent with their build descriptions and/or self-imposed constraints.