Your stock lower intake is what is hurting you the most - it pulls the 190cfm average flow upper down to average flow in the mid-140cfm range. The stock E7 heads flow in the mid-160cfm range, so do something with that restrictive lower stock intake (paste link in sig) or get an Explorer intake from a 95-early 97 Explorer (internal emissions like your stocker) for 15-20HP.
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Tom (Torque) Moss
88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE).
http://www.fastlanecars.com/
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