Can I spray the inside of the plenum down with carb cleaner?
What about the top of the engine?
More importantly, If it's just the regulator and nut-kit that are leaking, can I just replace them as opposed to the whole spider?
I'm not working full time and money is tight.

Thank you all for the help and advice.

 

Id use brake cleaner to clean it. It evaporates alot faster. yes you can just replace the nut kit and regulator.

Heres a video on the regulator etc. I found it helpful
YouTube - ‪realfixesrealfast's Channel‬‏

 

Thanks for the video. He made it look very easy.
Here is one I found that was helpful to me getting the plenum off:

YouTube - ‪Vortec Chevy Problem and Fix!‬‏