that is Bill Newlin's old race car....former GGR TT car. Back then it had a highly stressed 4 banger in it. He used to rebuild the motor at least once per year...
car is very light and was lightening fast even as a four banger.
car did a 1:40 in 1998 as a four cylinder car, at Laguna Seca.
I have been on the track with this car when it was still a 4 cylinder.
I can imagine what it would do with the 3.6L