First time I watched that Vette race was back in the 70s. The LT-1 was owned by a guy named Denny Greenwood....then Lynn Anderson....it's one of the reasons why there are 2 LT-1 Corvettes in my garage. You have a real 70 LT-1 there with great racing history. Speedy and Jan were great people to hang around with at the races.
I would go over the frame with a fine tooth comb looking for stress cracks and check the differential out....they tend to be fragile