Posted By: bobs66440
Unleaded Gas and Non-Hardened Valve Seats - 11/18/11 04:03 AM
Sorry if this has been discussed before, but I have a hard time doing a search here...
Is it necessary to have hardened valve seats on 906 heads ('69) while using unleaded fuel with limited mileage (1000-1500 miles per year). And, will a lead substitute/additive help?
Thanks!
Is it necessary to have hardened valve seats on 906 heads ('69) while using unleaded fuel with limited mileage (1000-1500 miles per year). And, will a lead substitute/additive help?
Thanks!