I have a 86 Chaparral 195 xls for my project boat. When I got it had been neglected for awhile. Bad interior and soft floor. The previous owner had a new reman 4.3 mercruiser installed but never fired it up , never even put oil in it. Well it was stuck when I got it , took apart and cylinders have some bad rust pits from sitting water and animal urine , valves are rust and stuck open . so long block not much good any more. I was just going to get used truck engine and do the usual to make it ready for marine use. My problem being I can find newer vortec engines but nothing older. Will my 86 intake and flywheel, and ignition bolt on newer 4.3 ? Which years should I be looking for? Should I put 86 marine cam in ? What do I need to do to get newer engine in and wired correctly? Thanks My normal boat I use is a 79 silverline Comoro tri hull, with 73 ,135 Johnson which I just rebuilt. goes great ,gets boring because nothing ever goes wrong. I like it .