what have I got?

[chevyfan1956]

Hi folks. Obviously I'm new here for I know nothing...your typical newbie. I've been helping a friend clean out her very large storage shed and found a car in there. We know it is a 1970 Chevelle...but don't know a lot more about it. Hopefully some of you can help us figure it out. Here is the info (and numbers) we've been able to find on it: the VIN number off the plate on the dash is 136370K182280. We also found the number 1021CRT on the motor. There is also an extra transmission with several numbers on it...they are: 3978764GM, 3885010, and Patent #3088336. There was also some literature that refers to LS-5HP. Any help I can get in further identifying this car would be greatly appreciated. Also, if there is something else I should look for to help identify what it has (or came with) it would be extremely helpful. Thank you.