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ron · 09-06-2012, 10:35 PM

double check the web but I think a 77 has hardened valves already,unless you still had leaded fuel back then in Australia

09-06-2012, 10:35 PM	#98 (permalink)
ron Master EcoModder Join Date: Nov 2011 Location: slo county ca. Posts: 277 double eagles - '99 Dodge ram slt Team Cummins 90 day: 19.48 mpg (US) Thanks: 24 Thanked 17 Times in 16 Posts	double check the web but I think a 77 has hardened valves already,unless you still had leaded fuel back then in Australia