It can probably be rerigged for the Montauk, sameh. I doubt if it will fit as is.
What is the weight of the Glastron vs. the weight of the Whaler and what is the trailer rated for weight wise?
havenot seen the trailer papers yet. As for the boats the weight is not mentioned. Here in Israel things maybe different from USA.
Anyway, the 2 boats probably around 400-600 Kgs, more important for me is the modification for a glastron boat to fit B.W.boat.
Ayuh,.... As already said, Ya, it can probably be made to fit...
Yer providin' No info, yet want concrete answers,..??
I doubt that trailer was MADE for the Glastron, but merely Adjusted to it...
All you can do is,... Try to Adjust it to fit the Whaler...