When I rebuilt the engine I noticed there was not a block heater installed or it may have been removed. Therefore, I would like to install one and get some input on the type and model I should purchase. Some prefer the O.E.M. in-block heater located in the soft plug. Some like the lower radiator hose in line system and also suggested was the in -line canister heater hose type. Then I saw the magnetic style . Or does it need one at all since the engine starts well. I would like your suggestions, comments.and expertise in this project. I know I should have installed one when I had the engine out. Thanks, Mecster