I use the 1.5 rockers on my Indys. I have a pair of them in front of me as I am writing. Intake and exhaust have the same offset. My understanding from Indy is that these heads use the same rockers as big block SR heads. Since SR heads are designed to accept standard big block rockers it stands to reason that any standard replacement big block rocker should fit. Also standard big block rockers [ everything from stamped steel to aftermarket ]use equal offset. One saving grace if you can grind enough clearance is that with a hydraulic your spring pressures are probably modest and with such a short pushrod 5/16 should be more than sufficient