hi guys i am looking at a 93 mastercraft with what i belive to be a ford v8 (5.7L) .boat is in mint condition and engine seems likewise however the owner has a piece of rock-wool jammed under the distributer..... reason being that its hard to start when hot and that its a common problem with this type of engine, he reckons that this is an effective cure but i am just wondering if this is true or is he hiding a potential problem, as usuall guys any help is appreciated Thanks..