i have seen 4 taken apart and they all had sloppy timing chains , well now I am putting one together and with a new gm timing set all others were garbage and this one cost 146.00 bux and the chain has alot of slop in it too what gives here

 

When building a high-output engine, you do not want to have excessive slack in the timing chain because it affects the overall accuracy of the valvetrain. We have noticed that in most LT1 and LT4 applications, there is large amounts of slack in the timing setup from the factory. Even when going with the GM Extreme Duty set, many times we have encountered more slack in the timing chain than we would like. To compensate for this, we have found an oversized crank sprocket which will tighten up the setup enough to reduce timing chain slack to an acceptable level.
FYI from Thunder Racing

 

When I tore down my older LT1, I didn't encounter any excessive slack. The new timing set was really no tighter than the original set (with new bearing shells) after over 100K miles. There was some radial slack in the chain, but a degree wheel mounted to the cam sprocket (instead of the crank) showed less than 1/10th degree of "slop" in the timing set. Checking with a dial indicator (BestTest tip) on the sprocket and some quick math showed less than four minutes of play (or, 0.067 degrees). Most timing sprockets don't even have keyways broached that accurately, and most camshafts (and the ignition devices they drive) don't even care about anything less than a degree.

You might want to check the actual rotational lash in the timing drive after it is installed to measure exactly how much that slack is costing you.

Good tip on the oversized (align-hone) replacement sprocket. You didn't get any real bargain on the timing set, either. I know they're not cheap, but here's what I got:

Timing chain, GM P/N 10128485 SDPC - $23.33;
Timing sprocket, crankshaft GM P/N 10128346 SDPC - $20.48;
Timing sprocket, camshaft, GM P/N 10206039 SDPC - $26.93

And I thought $71 was a little high.

 

shoot vader i probably should have bought my timing chain from gm my self it looks like with your prices i dont think it has much lash in it but it sure has side to side slop i will check for lash and also thunder racing has an over sized crank sprocket available

 

If you don't mind spending extra cash, Comp Cams has a timing drive for LT1s (#3206) that runs right about $480.00. It's a silent chain set (very heavy duty compared to double row sets but heavier) similar to the OEM parts.