I saw this today and was dumbfounded. At first glance I thought it was an S10, I even overlooked it... then noticed something wasn't right with the cab. Then it's like HOLY ****! I talked to the owner and it's still on the Regal chassis with a 3800 and FWD. He sectioned a wrecked S10 and blended it into the Regal. It even still has the spare tire well under the bed and the struts, pictured. The hood is off a real WS6 that was wrecked, and he once again welded it in... He's put 40k miles on it since he did the work, all by himself.
Enjoy.