Is this a Murray or a Thunderkart go-kart?

[1rustbucket]

Update:
Okay from the pictures I've been seeing on the net of different types of go-kart frames I would have to guess this is an old thunderkart go-kart although I'm still not sure....
Pic #1 "Is it a Murray or a Thunderkart?"
Pic #2 "Is it a Murray or a Thunderkart?"

Thanks for looking and for any help with solving this mystery.
Roy

[1rustbucket]

Update:
Back to not being 100% positive if this is a Thunderkart or a Murray. Looks like the frame of a Thunderkart but the jack shaft and pulley look more like a centrifugal belt clutch from an old Murray. Hope someone is familiar with this frame type and can give me some insight into what Wer're working with here. Would be a great help in getting replacement parts for it.
Roy
Pic #1 "Is it a Murray or a Thunderkart?"
Pic #2 "Is it a Murray or a Thunderkart?"

[terf dog 3202]

I think you have a thunderkart but im not positive. sorry i couldnt be of more help.