YES what you say makes sense, but this is a undecked block,unmilled heads,the intake fits fine unmodified, the intake bolts screw in by hand, its a stock 72 block ,the lifter angle has not been changed,i dont have a roller cam,nor roller rockers, the rockers are in the stock location, what does a TA intake rocker look like? the TA uses stock rockers on the exhaust,only the intake rocker is different. would a shorter pushrod change the angle from the rocker to the lifter of the pushrod? something does not make sense here.