My 9.70’s are in a car weighing only 2860 so it’s not a heavyweight, not a lite weight. That set of Edelbrock heads has the pushrod in the stock location but I used about ever available millimeter to do it. If this was a test n tune go for a balls out number I sure as heck wouldn’t have a powerglide and 14-32 tires on it. I would have a 904 and 10 inch radials. These 9.70’s were also at Keystone in the Summer. Not some coastal super-track. Bracket cars need repeatability