I'm in the middle of my first engine swap and ran into a snag. I took a 258 from a 1984 J10 with a manual tranny and put it in my 1983 CJ7 with an automatic tranny. I had to take the flywheel from my old 258 since the engine came from a manual tranny truck and but now have alot of vibration when I start the engine. (by the way, it did start... whewhoo).
I noticed that the flywheel from the truck was balanced (holes drilled in the sides of the flywheel) and my old flywheel wasn't. What could be causing the vibrations when the engine is started and running? Do I need a different flywheel, are they matched to an engine, and if so; am I trying to find a flywheel to match that engine or tranny?
Thanks in advance and HEEELLLPPPP!!!!??