I'm running a SCT with dyno tune, 6# lower and K&N. I dynoed 376/465 to the rear wheels. Total cost was right at $650. Using your stock numbers, this will net you 60+ rwhp and be very reliable and a BLAST to drive. That translates to just over $10 a hp. Hard to beat that.
JLP shortblock, Stage 3 heads and cams, 2.3 Whipple w/3" upper and 4# lower.Ba2800, Accufab, Pacesetter LT's, 60#inj, twin 255's, LFP efan, PI 2600 stall, Detroit Locker Tru-Trac, 58" LFP Tbars, Bilsteins all around, D.M.R. panhard, MT DR's. 564/598 on 15# boost