Fair price to change sparkplugs in a 1997 Ford F250 with a 460?

The Mitchell labor guide lists 0.8 hrs to remove and replace for the 460.

YOu shodu luse ONLY BOSCH or DENSO RIIKDIUM PLUGS to match our current LOW SULFUR euroepan style fuels! I woudl charge about $100-150 for this including a FULL ENGEIN BAY WASHING and cleaning and a FULL inspection of other wear iems as well! AT $100 per hour, then about this rate as well! I wodu also POER WASH yoru THROTTLE BODY and the IDLE AIR CONTROL VALVE that is FULLy removeable on ALL ford engines! NO MORE VALOLILINE only MOBIL ONE 0W-30 in there to keep teh SENSORS and PISTONS RINGS free of slduge and varnish! IRIDIUM PLUGs wil improve ALL aspects! HIGHER FUEL MIELAGE< power and torque as well! GOOD LUCK!!! The FINAL air fuel miksture is ADJUSTED by a clean T body adn IAC valve on ALL car engines! INJECTORS clean themselves up!

no need to have a vehicle pre school toys are not that far.

Thanks for the webpage,but that doesn't list the different engines. I was looking for an answer from someone who has actually done it