B767 FLC HAS NUMEROUS BIRD STRIKES DURING TKOF FROM BOS.

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FO LEG; JUST AS I WAS GOING TO SAY V1; I SAW 2 BIRDS 20 FT L OF THE CTRLINE. THE FO SAID HE SAW BIRDS ON THE CTR AND DODGING L AND R. WE HEARD 4-5 COMPRESSOR STALLS. SINCE MY HANDS WERE STILL ON THE THROTTLES; I PULLED THE PWR LEVERS BACK; BUT WHEN I SAW WE WERE AT V1; I PUT THEM BACK UP. I FELT IT WAS SAFER TO CONTINUE THAN TO ABORT BECAUSE OF OUR SPD AND WATER OFF THE END OF THE RWY. THROTTLES WERE BACK UP BEFORE THE ENG COULD DECELERATE; ABOUT 1 SECOND. AS WE THEN TOOK OFF; NO MORE COMPRESSOR STALLS HAPPENED. BOS TWR SAID THEY SAW A LARGE AMOUNT OF FIRE FROM OUR L ENG. AFTER CLEANING UP ALL ENG INDICATIONS WERE NORMAL; EXCEPT 691 IN WHITE ON L EGT. I HAD DIFFICULTY DECIDING THE CORRECT QRC. I THINK 'HIGH EGT/COMPRESSOR STALLS' SHOULD HAVE ITS NAME REVERSED AND OVERWT LNDG INFO SHOULD BE INCLUDED. AFTER COMPLETING THE QRC; IT SAID OPERATE THE ENG NORMALLY. I MADE AN ANNOUNCEMENT THAT WE HAD HIT BIRDS AND THAT THE ENGS WERE RUNNING NORMALLY AND THAT THEY COULD EXPECT A NORMAL LNDG IN BOS. I ALSO TALKED TO THE 'A' AND SAID JUST TO DO A CABIN ADVISORY. I TALKED TO DISPATCH AND IT TOOK A WHILE FOR THEM TO GET HOLD OF MAINT. I TOLD THEM I INTENDED TO MAKE AN OVERWT LNDG ON THE LONG RWY 4R AT BOS -- 286000 LBS VERSUS 272000 MAX. I COULD NOT FIND ANY PROC FOR THAT. I MADE A SOFT NORMAL LNDG AND SLOWED WITH DECREASING AUTOBRAKES AND REVERSE THRUST. I FELT THAT AN OVERWT LNDG WAS THE PRUDENT COURSE OF ACTION BECAUSE OF THE ENGS SUFFERING POSSIBLE DAMAGE. WE ROLLED TO THE END. THE FIRE TRUCKS RPTED ALL NORMAL. SO WE TAXIED TO THE GATE. DURING THE FLT WE RECEIVED MULTIPLE CABIN CHIMES AND IT WOULD HAVE BEEN EASIER IF ALL OTHER FLT ATTENDANTS HAD RELAYED WITH THE FIRST FLT ATTENDANT. AFTER THE FLT; THE MECHS SAID THEY FOUND EVIDENCE OF BIRDS IN BOTH ENGS; THE COWLING INLET; AND WING LEADING EDGE OF THE L WING ROOT AND WERE GOING TO CHK THE FLAPS AS WE WERE LEAVING. SUPPLEMENTAL INFO FROM ACN 558109: CAPT STARTED TO PULL THROTTLES BACK; BUT WE BOTH REALIZED WE WERE AT VR BY THEN; SO HE PUT THEM BACK AND I ROTATED AT ABOUT V2. I INITIALLY THOUGHT AFTER THE TWR CALL THAT #1 FAILED; BUT PLANE TRACKED NORMALLY. CAPT INFORMED ME THAT ENGS WERE RUNNING OK. FIRST REAL ISSUE WAS A SHORT DEBATE ABOUT WHAT CHKLIST TO RUN. I ADVOCATED THE COMPRESSOR STALL HIGH EGT; BUT CAPT WAS CONCERNED ABOUT SHUTTING DOWN A GOOD ENG. WE HAD A SHORT DISCUSSION AND AGREED THAT THIS WAS THE APPROPRIATE CHKLIST AND WOULD NOT HAVE US SHUT DOWN THE ENG. WE BURNED GAS; ELECTED TO LAND SLIGHTLY OVERWT; REQUESTED TRUCKS; AND DID NOT DECLARE EMER.