Needa5.0 - Converters make a huge difference. PI is a good company but very expensive, but as RC will tell you, do it right the first time and get the PI. Plus a 2 year warranty is nice if you to get the stall changed. A high stall like 3200 may not be necessary with a near stock car. I get my best results in launching from around 2000 rpms and I have a 2800 stall. Dont expect to get all the way up to those stall speeds either unless you have a transbrake. I can stall it up to about 2400 without spinning on a good day.
stunner - You might not need a chip with your gears if you have a shift kit. My rev limiter would bounce every once in a blue moon with my 3.73s, but once I get the shift kit I never had anymore trouble.