Charlie,
Do you have a copy of Crispino and Hoopers' Chevrolet Indy Pace Car Book, 1948-1990? Printed in 1992. Your car has its own chapter, #8. There is a mention of a special 360hp/350 motor, with a special A3-7N163613 service block installed for the race. Maybe they published the story incorrectly, and it should have been 325hp/396 motor. But then again, you confirmed the 4P on the cowl tag. Is there more sleuthing needed? They also published your cowl tag and VIN data.
