sounds frustrating. l&m = long and mcquade? you in ontario?

Sounds like your problems are significantly worse than some misaligned trem-parts, a broken string and fret-buzz, but.....

If the new trem-block doesnt fit, remove it and replace it with one that does fit.

If you broke a string messing with the tuning/trem-spring balance, you need to slow down and make smaller adjustments. You seem to be rushing and could continue to cause damage to your guitar.

Fret buzz doesnt have anything to do with your trem/block and tuning. However, you might not be hearing fret buzz. If you didnt hear that buzz before you messed everything up, then its its more likley the buzz is coming from something you changed or messed with.....the new trem/block for example. Or if you have fret buzz, when you didnt before, you may have screwed up your action by changing the bridge configuration relative to the face of the body. If the back edge of the bridge is not closer to the body, you likely lowered your action. In this case, losen up the trem-springs a little and retune.

The back edge of the bridge should be about 1/8th inch off the face of the body and the bridge should set essentialy flat to the plane of the body.