What size flywheel does my 98 GT have?10 1/2" or 11"

Guys i need to figure out which size my flywheel is so that way I can buy a new aluminum one from fidanza and also a new clutch..I have a new forged shortblock that requires the use of a 8 bolt flywheel instead of the 6 bolt one i have..So does anyknow what size mine is or what size the fidanza flywheel is?
 
Looks like 10.5 and they make one with 8 bolt for the early cobras.

6375-1 96-98 Cobra 8 bolt, 10.5" clutch
6375-2 99-01 Cobra, 03 Mach 1, 8 bolt, 11" clutch
6375-3 96-98 GT, 6 bolt, 10.5" clutch
6375-4 99-04 GT, 6 bolt, 11" clutch