For an A-cat mast blank is typically around 9 kg's (19 lbs)while the Taipan mast blank is 13,5 kg's. (29 lbs) Single hander mast blanks of big builders usually measure 18,5 kg's and more (41 lbs and more.)

Naturally the increase in weight won't help you but at 180 lbs = 81 kg's and at 2 inches less than 6 foot tall you should be able to right all singlehanders.

Wouter