[ilvracn]

i have a question on the use of lead additive. i thought all engines built before unleaded gas came around, needed the lead to lubricate the valve seats. i have seen small block chevy heads with the seats completly gone. do the 305 heads have hardened valve seats? ive been running aviation gas mix in my 66 c1500 to keep some lead in the fuel, but that gets expensive. I use ZDDPLUS, oil additive with valvoline 10w 40 conventional oil, the rotella is excellent as well. both have great additives, just trying to put another option out there

RICK