Hello, Long time first time. I’m missing something and could really use some help. Just did a mild top end rebuild with new rod bearings, crank bearings, and rings. Stock pistons n rods and re-honed the cylinders. Never touched cam n crank. Pistons got mixed up at the machine shop where I had the heads resurfaced and the valvetrain assembled. I had them hot tanked with the heads to clean them up. No they weren’t marked I just had them in order in their wash basket thinking I would also unload them when they were done. My bad. Kept the rod caps intact and correct so could at least distinguish driver side front passenger side.Installed new standard crank bearings one at a time. When they were all in then I torqued them in order. Hod to tap the crank forward a hair to get the last pistons in. Didn’t tap it back because it seemed it would bind up on the rod. Did my best to check end play clearances with feeler and plastic gauged all the bearings. Needed standard bearings in all pistons except one and two, they needed .010. No binding issues and the engine rotated with a torque wrench at about 55 pounds. Sometimes it’s tough to get it to begin to rotate by hand but once I do it’s usually smooth until I stop and have to start again. Mechanically it looks like it’s put together correctly with no identifiable binding. I was liberal with the assembly lube and pre-oiled before start up. Set distributor by plugging number one hole and check for compression, then rotating timing mark to zero. Rotor pointed at number one and I can see the piston at tdc, and assembled plug wires accordingly. Start up resulted in some pretty significant shaking and a very consistent knock. It will idle steady but the knock seemed lower and light smoke from tbi. Could my timing be 180 off? Could my harmonic balancer have rotated or something? I found a similar thread that referenced a spun balancer but looks dead on so I’m looking for new info. I’m at a loss now. Any and all input welcome. Thanks in advance.