Hmmm... I pulled my pan off and posted pix to confirm what crank was in there. Turned out to be cast, Requiring a special balancer. I ended up swapping the engine to a nice 360 out of a truck for 300 bucks.And a factory flywheel... It was out of complete frustration. And it's still there. I'm about to replace the rear housing/axels in a last ditch effort. But there was/is more than one thing going on with mine. I havn't been around much because I'm pretty bummed out about it. (lurking) Your troubles sound kinduv' similar. I've tried everything!!!
What year 340 is it? if it's a 73 you might want to pull the pan. Confirm the crank. I feel your pain! Good luck,Don't give up. And keep us posted. Best 300 bucks I've ever spent...
