Hello Chuck (can I call you that?),
Good news first: you're strong enough to Snatch that weight without problems.
I think you need to make a few changes, some easy, and at least one which might not be.
First the easy parts; I would bring my heels in a little bit, say a couple of inches. Also, I think you could afford to experiment a bit with your grip and widen it, but this is just a suggestion.
Also, you might want to try and turn your elbows backward, locking your triceps, and keep them there for the duration of the pull.
The hardest part is that the rhythm of your movement is a bit off; you are too impatient.
First of all, you first pull should be a hip movement; feel your hips raising, and keep your back angle to the floor constant. In other words, keep your shoulders over the bar. When the bar reaches the top of your knees, your shoulders should still be over it.
Then, the waiting bit; you need to wait until the bar travels from the top of the knee to the 'go!' position. A good 'go!' position is higher than you think. Top athletes explode when the bar is in their groin, in the crease between legs and torso (a wide grip helps reaching this position); the general rule is to wait until the bar is high enough.
The trouble with this phase is that as you wait for the bar to reach high on your thigh, your brain will start screaming "it's too late, it's too late, there is not enough space left to explode, we need to go now". And you'll go way too early.
And because you go too early, you need to bend your arms, which is what you do.
You have to wait.
Once the bar reaches the right point, you still have to jump right upwards (rather subtle difference compared to banging your hips forward) keeping your arms straight, then shrug your arms back while diving under the bar and then re-straighten your arms in the lock out position.
It's all quite complex, and will take a bit of practice. But I think the most important thing for you right now would be to fix that first pull and learn to be patient before pulling the trigger.
Once that is fixed, adding the rest is easier. But if the rhythm is wrong, no amount of tweaking will make much difference.
Hope this helps,
IPB