how much work is need to make a mi stang is there any frame work will the body parts fit or is there cutting to be done. i would like to try and do one of these
any info on the subject? thanks  

Apparently, you just need one big M&M -  Miata & Money.  

See m1stang.com  

I don't know if they offer kits or if you have to send them the Miata. Heck, they might even find one for you.

From what they told us last year they don't even have to drain fluids on the car. It is simply a reskin of the car with Mustang sheetmetal. The work doesn't look too complicated, but I'm sure there's some tricks as to where they shorten the panels for the Miata's shorter wheelbase. If you see one in person it's not a bad look. I'd probably modify the interior more if I owned one, but from the outside the proportions aren't bad...

The link above will tell you all you need to know...

Mark  

Try here, you can get the whole conversion kits and everything...

http://www.monstermiata.com/

It's where some of the guys from the Peachtree Miata Club recommended to go.