I have installed three different Mercruiser 5.7 liter engines in cars, 1 was a Chevy 3500 panel van. I got a 5.7 liter Mercruiser that was tinned and changed out the water pump to a car water pump, the shaft is shorter on a car to accommodate the fan for the radiator... I used a block off plate for the fuel pump, and used a H.O. pump for the M.P.I. I installed. The injection was a kit I bought for a conversion from Carb to M.P.I,... The factory Mercruiser Cam is the same as a R.V. Cam, it gives you just a little bump so it sounds awesome in a car or truck.I've got a question that may be stupid but I was just wondering. I know a lot of people talk about swapping automotive v8's in boats but the car engines aren't made as strong and don't have enough power that a boat requires. So if a boat engine is made "better" than could you put a boat engine in a car?