I am in the process of pulling the junk 318 and 904 from my 72 Swinger to start the resto. I can see evidence of some pretty heave pitting and surface rust on the stock V8 K-frame. I am thinking about replacing it and I know where there are 2 spool type k-frames, one has a complete disc brake setup on it.

My question is what are the benefits of the spool k-frame over the earlier biscuit type and are there and problems with the newer design that I should be concerned with.

Any help will be appreciated,
Joe