Solve the TH400 LEAK!

[CB1987]

To begin with I am new to this board as well as the mechanical arts. Although I am phenomenal at carpentry it did not surprise me that it didn't transition into this truck I purchased.

I recently bought a 1968 GMC 2500 non-matching 350 and TH400 transmission. During my search for a vehicle I noticed everyone here loves to see shots of the truck so I attached one to fill that need. Mechanically the truck is pretty good with little things to buff out, no big deal it will be a good learning experience. Initially the transmission pan was leaking...so I replaced the gasket and it was fixed. As happy as I was about successfully completing this without professional or Google assistance, it did not last long. I have no idea what these parts are called so attached are photos. There are slight leaks in these locations. I would hate to bring it to someone to get fixed but I am at the verge of it because I need to for work in 10 days! Is there any easy fix for this that I haven't been able to find?

Remember I know nothing in this field but if it is needed I can take verbal abuse pretty well! Thanks for the help.

I wasn't able to upload them directly but here is the 1st leak.
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http://desmond.imageshack.us/Himg543...pg&res=landing

I tightened it up, the leak went away and came back after an hour or so of drive time. After I tightened it again it never went away.
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http://desmond.imageshack.us/Himg26/...pg&res=landing

Yea loosened or tightened still leaks a little. I can tell the previous owner tightened it too much because around the threads there are little dents where I think it might be leaking. Is there some sort of silicon I can put in there?
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http://desmond.imageshack.us/Himg840...pg&res=landing

This one is the worst of the three. Drips about once every 20-30 seconds. I looked up what I could and found what i thought was a solution. I removed that bolt holding the lever on and put in a generic rubber seal. It worked a little bit but didn't stop it completely.
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http://desmond.imageshack.us/Himg36/...pg&res=landing

There is a shot of the side, not the best but the best one I have on my computer. Thanks for any help you all might have. If there is any more information you need just let me know! Also, if you can give me a brief description of what the 1st and 3rd parts are would be appreciated.