I'm running a 14.5 with vararam intake tci 3000 stall 410s e fans shortie headers magnaflow 3inch exaust and tune on a 4.8 do u guys think its posible to run a 13.9 with a good cam and longtubes and maybe the pully??

 

I think it's possible. Cam, LT's and pulleys should give you ~40-50rwhp with tuning of course.