It's not hard. Start at the top end of the gas pedal, lift it so you can take that end of the throttle cable out, follow cable to firewall and see the square plastic piece in the hole in the firewall, squeeze the sides real hard and push it thru the firewall then just pull it out of the firewall and unsnap its connector from the existing TB linkage. Installation is the reverse of the removal. Be sure to get the same year TB cable as the V8 TB you install and don't forget to clean it real well, transfer all your original sensors to the new TB because you know they still work OK, and use a new TB gasket.

As for plug wires, I really like the Belden Premiuim wire set from Napa. They work great for a good price.

Jimmy