Angular, After looking at your pic's , I would substitute that motor for a cheap bench grinder motor so you can have a fan and a pump drive, I have had many projects that have out smarted me in the final cost, so not to worry, you are not alone, bottom line, never build what you can buy, unless you have all the parts lying around. Looks nicely built and it should work. I can see it with a diamond plate aluminum box which would really make it look cool.