i got a 350 vortec from an 1998 gmc truck and i changed the cam its got a 494 lift and 260 duration i also change to a performer rpm intake with a 600 double pump mechanical secondary (holly carb) i also put on the 350 tpi exhaust from the manifolds back with no cat.3 inch dynamax ultra flow muffler and 3.42 gears with a five speed manuel , underdrive pulleys 17 inch rims with bf goodrich zr radials with mac lower control arms. i 'd like to no what you guys would think this car would run in the q mile and also how would a good set of headers go on my car .where i live there are no tracks nearby thanks guys

 

Headers and a cat back would improve your times. The stock exhaust is pretty resrictive. As for the time, I'm not sure, it'd probably be better to ask this in the theoretical and street racing board.