GND COLLISION BTWN 2 LIGHT ACFT AT SPG.

Narrative

I WAS CLRED FROM THE NW CORNER TO TAXI TO RWY 06 FOR DEP ON THAT RWY. AT THE HOLD LINE I WAS STATIONARY FOR MY RUN-UP. UPON COMPLETING MY RUN-UP; I SWITCHED TO THE TWR FREQ FOR TKOF CLRNC AND WAS CLRED TO TAXI INTO POS AND HOLD ON RWY 06. WITHOUT ANY WARNING; THE OTHER ACFT COMING FROM THE OTHER SIDE OF THE RWY; XING THE RWY AT GOOD SPD; COLLIDED WITH THE L FRONT OF MY ACFT. I HAD AT THAT TIME NOT BEGUN MY TAXI ON TO THE RWY. IT WAS NOT POSSIBLE TO TAKE EVASIVE ACTION IN THE TIME FRAME; AND THE OTHER PLT HAD NOT SEEN ME (LIMITED FORWARD VISION IN A TAILDRAGGER). I WAS HEAD DOWN CHKING MY GAUGES; AND BY THE TIME I SAW THE OTHER ACFT COMING TOWARDS ME THE COLLISION WAS IMMINENT. THE OTHER PLT HAD NOT CLRED HIS WAY VISUALLY; AND HAD NOT BEEN ADVISED BY GND CTL OF MY POS. I HAD SWITCHED TO THE TWR FREQ; AND HAD NOT HEARD ANY TAXI CLRNC BEING ISSUED TO THE OTHER ACFT TO CROSS THE RWY. HAD THE OTHER PLT MADE CLRING TURNS DURING TAXI; HE WOULD HAVE SEEN ME; AND HAD THE GND CTLR ADVISED HIM OF MY PRESENCE; THERE WOULD NOT HAVE BEEN ANY PROBS.