Heads and Cam
Or you could get ahold of slowhawk at dez racing in seekonk MA about a little over an hr from you.
Or even ESP which is prob an hr/half from you.
But you are looking anywhere between $1000-$2000 depending on where you go plus dyno tune and whatever else needs to be replaced in the engine.
Trending Topics
The Best V8 Stories One Small Block at Time
66 Woodhouse Avenue
Wallingford, CT 06492
Local phone: (203) 269-1539
Fax: (203) 265-1214
http://www.eastsideperformance.net/
They dyno tuned my buddies cam only car with their ESP1 cam and made 420 rwhp through a 6 speed, 10 bolt, headers, lid, highflow cat. They do good work. 

