Install hardened exhaust seats in the heads. That is all that would need to be done. These cars are so old now, that unless it is a "survivor" that has never been apart - most have had the heads R&R'd at some point and have had this done by now.
__________________
1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
|