Recent content by BuickSix

The flex plate can only bolt on one way right?

The flex plate is correct. It matches what they sell on Gbody parts and Rock auto.

Ive had my own gauge on it...........17in steady at idle.

It got a new chain, gears, lifters bearings, oil pump. Cam & crank were polished. Pistons reused. The flex plate was replaced at the time of rebuild. I find it unlikely that it is the wrong one....I could be wrong.....worth checking.

Reread the post.........I did compression test and leak down.........150 psi across 6 cylinders...+ - 5psi.

This issue started after the engine was removed for a rebuild. Just a stock rebuild, nothing fancy. The engine has always seemed to have a long crank before it fires but it was doing that before the rebuild. So the problem is a miss at idle that shakes the engine, its not a dead miss as it comes...