These two are for somebody to get started quickly.

First is a 'Bucket T' frame.You don't care about the bucket t you just want a straight square frame to start with.

You can graft a stock car front suspension onto it and have a good start.

Other way is do the bucket t Ford axle up front.Be outdated suspension but it will get down the road.

The second is a Ford Crown Victoria, Mercury Marquis or Lincoln Towncar.

Get a sawzall and a torch and get rid of the body and everything else except the rolling chassis.

Keep all the suspension and the steering box.Junk everything else.

Either route will get you building a one off sportscar chassis quickly.