Kinda wierd issue..... car picking up the worse the air is

All twelve passes the car has went 1.57 60 foot exactly.
Minitubbed low 11 sec car with ladder bars and radials. Stock 360 shortblock with mild eddies and healthy Howards solid cam
It always hooks.
Incrementals are little soft everywhere. Mph started off nearly 3 off, its now gotten to about 1 mph from the norm. Slower to 330, 660, 1000 and 1320
Its almost( dumb thought i know) that ring seal has gotten better as i beat on it???