U-joint info

[GMGoodman@aol.com]

It started as a clunk.....actually thought I had something loose in the 
trunk...has increased to a  clunk or two upon accelerating in 1st at very low 
speed....can be brought on by decelerating quickly in 1st gear at very low 
speed, with a little punch on the gas......I think its the rear 
u-joint....what do you all think?  Is there a place to get good info on 
replacement ...I hear its not to difficult.  What tools are needed?        
Thanks in advance     Jerry     It's a '72 B