putting a 1 iron shaft in an tourstage airmuscle 3?

Basically currently got a graphite stiff shaft, want to lob in a DG x100, and possibly make the shaftl onger to make it a 'real' driving iron - any suggestions? - what would happen to swing wieght etc - or what could I do to make it a really solid driving iron (not to bothered about fairway shots etc - just want something for the tee)

thanks

dont see a problem.. just do not go too long in length.. overall weight will go up with the steel shaft.. and make it too long and it will probably work against you.. make it one iron length and roll with it.. hope it works out for ya..