Hi i have a 1990 18 foot with a 4.3 liter mercruiser alpha one. I just bought the boat and there was no engine compartment box. now the question is; how close can i put the side panels (i made) to the side of engine.how much space should i leave in between engine and panels.I have about 6-8inch in front of engine and front panel. I am trying to get as close as possible to engine so i can get seats on each side of engine. but without any problems with eng overheating cause there is not enough air circulation Thanks for any help 