http://ifitsgotwheels.com/pictures/var/resizes/comet/comet%20_7_.jpg?m=1302138128
basically gota do this.. cut out the inside and make your own.
not alot to know or wonder about.
id use an s10 front end, make your own rails from the suspension all the way out.
use an s10 rear also should be plenty narrow enough.
unless you are going to run wide rear wheels then whatever axle you choose..
lay it out and start building the car around it