A T34 (Hybrid) is bigger than a T3, I should imagine a T34 will be too big for a FRST, as it is you need to do mods such as moving the radiator further forward to fit a T3 as there simply isn't the room, hence Ford fitting a T2 in the first place.

You are not entirely clear as to what you have, but assuming it is a T34, I certainly would not do a swap, but would, if cash was to also be put your way!

Martin