We extend to you a cordial "WELCOME ABOARD !" Come on in, make yourself at home, we are a friendly group of enthusiasts, and we also appreciate the classic Chris Craft Roamer, Corsair, and Lancer boats too , as they are all on the same family tree and share much in common ! Just start by posting a note introducing yourself to the group, that's all it takes here (we don't ask for or retain any personal information here, because our intention is to just "have fun and share information".
We would like to see pics of your boat, Sounds like you have a 327 or 350 for sure because the casting numbers don't lie. A 307 has a 3.75 bore. It is essentially a 283 with a 327 crankshaft. My bet would be you have a 350 and it could be a standard left hand engine still mounted backwards in the Q configuration because a Volvo outdrive can be made to run in either direction simply by changing the shift linkage behind the rear cover. Both engines would use the same rotation distributor, that doesnt change, because Chevy changed the cam rotation, not the distributor rotation. Please get the casting numbers off your heads under the valve cover. Yes the Barr exhaust would work on both those engines. You could easily have 275 hp engine there. I wouldn't worry about the corrosion. Run it until she blows. You can't do anything about past history anyway, just do a good job winterizing it from here forward with A/F in the block. I, like you would rather have the engine turned in the forward orientation but let others chime in here with their opinions on that originality subject. I will be having questions too when my Lancer project starts, in that area. I am more into performance than originality so I may have to control myself not to install a late model big block or Volvo DP in mine.