Way back 25-30 years ago a v8 race motor would last 40-50 races then you rebuilt your tired low compression smoke puffing motor back into a tiger, now, 8 to 12 weekends if your lucky on a stock rebuilt IT motor. Is it the quality of parts that has changed or is it some other factor that im missing, its not rpms, its not my 60 year old engine builder, he's like a rock, unchanged in his ways, so what is different?