Todd F I feel i must put in my opinion on this for you. A conFE is not smooth like stock, im sorry, but i owned one for 35K miles. And have driven at least 3 other trucks that had them. The clutch will hold very very well and you can do stupid and abusive things to it and it will recovery perfectly. As a matter of fact the harder you drive it, the smoother the engagement seems to be. I'm sure Peter could explain why that is. However, i feel that in extreme stop and go traffic like you are talking about, you may get frustrated with it. I have had a conFE, and a conOFE. The OFE has much better manners. It has a very "positive" engagement, but not near as "grabby" as the full FE. I run mach4s and a B1, so our HP levels will be very similar when you are done bombing, and the only thing I would worry about with the OFE, is i think you will be on the edge with it. You will probably be fine if you drive it like you paid for it, but if you like to "test" things like I do, you will probably push over that edge.
Now, you said you can only afford to do it once, so my honest opinion is save the money and, buy a twin disc. I currently have a mcleod street twin in my 2001 and it has done its job very well. I bought this clutch, because i tow very heavy (14-16k)trailers on a semi routine basis, and i did not like backing up or starting in traffic with the FE. At the time Peter did not offer a "street" twin disc. That has now changed, and southbend is in the process of building me a twin disc with the ConO type linings and a 3600lb pressure plate. I can not wait to put that bad boy in, as i feel it will finally be the ultimate clutch for my application. (tow heavy, daily driver etc, no sled pulling) I promise if you spent the money for a twin disc, you will not regret it. You will get all the holding power, without the more aggressive manners of an iron single disc. Yes, they do make a little noise, but you get used to it. If nothing else, call Peter at southbend and discuss your application with him. He is a great guy and will steer you towards what he thinks will work best for you. . Phil