ur wires will still work and on the clean it just depends u can use degreaser and water on the out side if the block(have the oil pan on and if the head is off cover the top of the block with a clean towel if ur cleaning the pistons, rods, cams, etc. use mineral oil... and if ur breaking the block down and taking pistons out then it wouldnt hurt for some new rings anf honing the cylinders and if u break down the head fully i would recommend bearing grease ( auto parts has it and its red) when assembling and remember to TTS