how much gain from B cam?

[fiveohpatrol]

i found a B303 cam on ebay for about 100 bucks so i couldnt pass it up,it came in today and i was just wonderin how much gain you think this will give me (if any for now) along with some new comp cams valve springs,(my stock ones are worn, valves float about 5400rpm)
i MAY get to a track one more time before i install everything, and i know my car has atleast a 13.5 in it, maybe 13.4
i gained over 3 tenths over my best at one track (14.08 to 13.76) and my best AOD run was a 13.77 at a different track, hopefully i can get up there soon and hit a 13.4

what kinda gains am i looking at guys? aproximate hp? ~ 10-15 with stock ported heads? what about et/mph? thanks guys

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88 Notch, B&M Ripper, 3.73's, Ported E7's, Explorer int. w/ ported lower, pulleys, 1.7RR's, BBK headers, off-road H-pipe, flowmasters, subframes, 65mm TB, March ram air ,MSD coil, U/L control arms, 155lph f/p, Crane Adj.FPR, Nitto drag radials, best 1/4--> 13.76@101.4 on a 2.17 60ft