Once Upon A Time...Many years ago...
There was a very fast 1971 351 Cleveland in Division X...
Got torn down many times and everytime it got torn down, the driver will change the limiter and go another 10th quicker just to make NHRA go crazy.
One day, I got a call from NHRA tech asking me if there was a way or method to shrink cast iron. So, I ask Why?
NHRA had gone and procured a virgin set of Cleveland heads with the same part number used by the offender. They had the cylinder heads prepped with a legal valve job and appropriate parts.
When they poured the runners, the numbers were way smaller than the numbers they had recorded on the racer's cylinder heads. They could not figure out what had taken place since they had also measured the width of the cylinder head to make sure they had not machined the intake and exhaust surfaces excessively to maintain the volume numbers.
