Okay, tight converter. Well, as tight as your going to get with a 499" big block and 3.55 or 3.23 gears.

I have had PTC and Ultimate Converters build me as tight a street converter as they can for my 540 Hemi. Ultimate's converter will flash to 4,200 and the best PTC could do was north of 4,500. And that is with 3.91s. Not exactly what I call tight, but was all they said they could do with the cores available.

The Ultimate does feel tighter and the car feels more responsive down low. Just better for driving around town and cruising.