How fast can you go with a Magnum? Who has the quickest setup?

if you can find a set of RT heads true RT heads not just ones from a dakota RT, you can get them to go over .550 lift. Mine are set up for about .600 lift on them. Also computers can be reprogrammed to your set up. That is if you are still using the JTEC computer. If so there are companies like SCT that allows you to send programs to your computer. If so the major programmer out there right now is Ryan. Stock blocks I believe the limit is somewhere around 600-700 hp with superchargers..some are getting higher with turbos. if you are staying N/A and keeping the magnum intake bolt pattern, look for the mopar performance 2bbl intake. It was one of the better intakes for the magnum engines. As far as TB's go look at F&b throttle bodies, they are good. I run a magnum 408 in my dakota with a good shot of nitrous, all from a reprogrammed factory computer..