I don't expect much help here on this one. (there in no interest in this car or engine) I've learned that the 1984 3.0 & 3.8 FWD (front wheel drive) share the same block and assume the heads are the same (if someone knows please post). I assume the difference in the displacement is in the pistons, crankshaft, and the connecting rods. I bought a V6 and installed it years ago when I restored the car and think the rods and mains are getting a little loose. The newer V6 had 3.8 embossed in the top part of the block near the transmisson end and had a metal remanufacture plate glued on the side of the block showing it was a 3.0. So in short I have the orginal engine that came in this car and need to decied the best route. I thought about the 3800 swap but I've learned that would be a very involved repower because of the electronics from old to new and drive line differences so now I'm looking onto staying with the orginal engine because of the emission testing in MD and ease of a install. I thought I could my 3.0 and build it to a 3.8, but there are many unanswered questions, the 3.0 uses a unique front pulley assembely and has no dampener and the 3.8 does, the 3.0 uses a unique flywheel with a welded on counter wieght and the 3.8 doesn't and these are some of the things I saw. The other option would be just do a standard rebuild on the engine I have and install a better cam and look into a 4 bbl intake and install a 1984 V8 Quadrajet and transfering all the internal electrical components (M/C solenoid, I.S.C motor, and T.P.S.) because the carburetor are the same except for the secondaries. If anyone sees a mistake in this post please let me know and I would like some input from you V6 Buick guys, Thanks AL.
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