Anyone recognize this?

I figured when I got this the other week it was some type of late '60 or early '70's INDY OFFY. But after going through pics of all the starting grids of that period I saw nothing that would conform. The only reason I think it may be modeled after some type of 1:1 car is there is an induction on the right side and a single exhaust on the left. This would lead me to think some forethought was put into the casting and possibly an inline four cylinder should be under the cover.There was also a wing on the back but it is gone. Tomica was the original manufacturer. It was remarketed by AVIVA as a "Peanuts" comics car. "Woodstock" is also MIA. If the car was actually modeled after a 1:1 I'd like to replicate it. If anyone has an idea as to what it is or what type or class car it is I'd appreciate some input. Thanks

http://img208.imageshack.us/img208/4558/indycaroffynq9.th.jpg (http://img208.imageshack.us/my.php?image=indycaroffynq9.jpg)