But the original short stock exhaust spring now needs to be shimmed to rectify the loss of seated spring pressure OR select a spring that would net a sensible seated pressure, (not use the non dampened stock intake spring with the intake retainer and 2 groove valve/keeper combo that nets 120 lbs on the seat).
Roger...makes sense on the height now. But I believe the 120 lbs on the seat is in error for a 1.6-1.65" installed height for a stock 360 single spring of that vintage; should be in the 80-90 lb range ....????
120 lbs on the seat sounds more like a 340 spring.
