Rear Suspension on my '64 short fleet

[fishmunger]

Hi, my truck is lowered 5" in the rear i believe, it has 3" drop coils and 2" blocks. It was already lowered when i bought it over a year ago, and i've never had any problems. But now I've actually been using it to carry **** around, and it bottoms out all the time. It doesnt have a c-notch, so there is only about 2" between the rear end and the frame. Obviously i need a c-notch, i was planning on getting the CPP one, but was also wondering if i needed to relocate the shocks and get new ones. I'd like to keep it to a minimum cuz i'm in college and have no money, but i want to do it right also. The previous owner was a pretty good do-it-yourself guy, so when he lowered the thing, he didnt use an adjustable track bar, but it looks like he cut and welded a stock one to the right size. *I don't think* i've had any problems with the rear end moving side to side, but is there a way to check for this? Hopefully i dont need a new bar....

On a side note, i am planning on starting to tow a boat (20') with my truck probably next year, would my truck work assuming a got the c-notch, shocks, etc. all figured out, or am I going to need bags too?

Sorry for the long post but thanks in advance for all the help...

Nate