Im hoping somebody can help me. Here is my boat. It is a 21.5 foot 1978 Caribbean (I think they went out of business in the mid 1980s, but Im not sure, any information on the company would be appreciated) I/O powered by a Volvo Penta 255B. I realize that because of the age it may be difficult to repair and maintain, but it is the boat I grew up with and was handed down to me, so I would like to try and keep it if the costs dont get to high. The boat has always been well maintained, but when I moved to Indiana from California 4 years ago I had to put it in storage and it has not been used. Unfortunately the person that did all the work on the boat and knew the most about it, is no longer with us. <br /><br />First question. The markings on the valve covers are Volvo 255B, and some of the other parts are marked Volvo. However, the intake manifold says GM. Is this a Volvo motor or a Chevrolet? Does anyone know anything about the 255B? I always thought it was a Chevrolet 350, but apparently Im wrong. Ive seen a few manuals advertised on the internet, does anyone have any recommendations. <br /><br />Second question. Like I said its been in storage and hasnt been used for 4 years. I tried to turn the engine over the other day and its froze up. I did a search on the site and have tried most of the suggestions (Marvel Mystery Oil, break fluid, transmission fluid). This weekend I am going to try some diesel fuel. If there are any more ideas Im willing to try. I realize that even if I get it unstuck, the chances of the engine being okay are very slim. I was considering swapping the engine for a Chevy 350 I built for my 55 Nomad. Unfortunately the restoration is going to have to be put on hold for some time (oh honey, it doesnt cost that much to raise kids yeah, right!), and then when I do it I am going to put a 255 back in it. Anyway, the 350 is just sitting here, it has less than 5000 miles on it. The engine was bored .30 over and has drop forged pistons. The heads were ported and polished and its got a Carter 750 on an Edelbrock intake manifold. The cam is an RV (recreational vehicle) cam, I dont remember the angles. Anyway it has plenty of power to smoke the tires on that lead sled. However, I was reading some posts on this sight about swapping a marine engine with a car engine and Im not sure if it will work. Apparently the cam angles are different. Does anybody have any ideas if this would work because the engine is more high performance than a standard car engine? Would I be better of 1)junking the boat and saving for another one (many years down the road), 2) rebuilding the Volvo 255B or 3) drop in the Chevy 350? Im okay with a wrench when it comes to cars, but I dont really know anything about boats. I would really like to try and learn, so any information you guys can give me would be greatly appreciated. 
