i currently have trs drives on my boat .is it true i can bolt a speedmaster 3 lower on my trs uppers .there is a set in the swap shop i would be interested in buying if they will work .i was under the assumption that they will bolt right on maybe im wrong

wrong,thats something even a touch and a sledge hammer wont make work, a "#2 speedmaster foot looks like a # 3 and the #2 will bolt up i think

The 2 will bolt up but will be deeper in the water than the TRS and actually slow the boat down.

That's right, also parts for the Speedy II are extinct.