Gone 11.99-12.0's with my pump gas street car 8.5:1 compression 340 with that cam....I currently run one in my '78 dodge truck, and its stil awesome.

There are two key issue to making that cam work....
1. Fast advance distributer, and as much timing as the engine will take without pinging.

2. It does not like the stock convertor. If you have to run the stock one, there is a comparable Comp Cams .525 lift cam that has the duration to accomidate a stock convertor. You need at least a 2500-3000, or it won't be very happy with the 484. I had a tight 8" 4800 in my '72 Cuda running 12.0's with a 340 pump gas and that cam and its currently in my '78 with a 360 in it, and the street manners are fantastic.

Now if a 484 has bad street manners, you really would not want to ride in my other street car! That cam is plane nuts.See attached.