a widebody huh? well, i am ordering a widebody "kit" from japan for my new MX-5 when it arrives and the parts alone are costing 4K plus shipping. remember though, thats premade. to design a custom widebody, which you will need may cost a lot more than that. you will probably be looking around 6K and upwards sorry to ruin it for you, but unless you got money to burn, i would leave it till later.
IMO i would leave the exterior and concentrate on the performance side of it. would be a nice sleeper. maybe go an rb30det? up to you?
nice to meeet you