1960-69  Heavy Duty  GM Valve Springs with inner damper, set of 12 .I recommend  to change them with your next head job; Don't forget that after 40-some years, valve  springs are likely to be all worn out. They take a lot of abuse related to high engine temperatures. So hook up your engine & you will notice a difference in performance, I did ! I use them in my own personal rides, as well as clients', we are really satisfied with the performance. And , yes, they will work perfectly in 95 HP, 102 HP, 110 HP,  140 HP, 150 HP, 180 HP,