Going form solid Escort axle to MX5?

[waynes world]

Hi guys, i am running a 5 link setup with MK1 ford Escort axle, now the reason for this swap to MX5 is that i want a wider track, and it should give better handling aswell.
The escort is 52" wide and the MX5 is 56.8" so itwill widen just that bit more as ii want.

I want to do this to my Dutton Melos not a Haynes Roadster.
Can anyone advice on this at all, i am ok with the fab work.

this is the chassis at the minute, if anyone can help i can get some more pics later as i have removed the axle and links now, lots of room to fit it, i was even thinking on keepinf the subframe and drives etc to make it easier, possible to bolt the subframe to the chassis with extra brackets welded on..