On a mt60 chainset, 115mm would be close to hitting the frame on the small ring or the arms on the stays. They should be 122mm ish and 68mm shell.....unless its got spacers in it!
As for the forks.....as per page 1....they cope with 80mm travel ok on that geometry, much more and its not going to be good.....imho. Thats 420 /425 mm tops in modern parlance. 1" rise equates to 1o on the headtube slacker, but its not as simple as that....because the bike rotates around the rear spindle, so you also move the seat tube back, the crank up and therefore your relative seat position changes down and forward cater. You also alter the fork rake therefore the steering performance and the top tube rises.....stand over height?
As i said marin frames cope ok, due to the seat and head tube angles being pretty old skool.....but if you want more than that, buy a newer frame to start with.