Re: '88 Grand Wagon brake job

OK so I took off one wheel today (the one that I was told was the bad one) 
and the drum is really rusty and the rim edge is broken off in places. It 
doesn't look that bad but I can tell if you were to drop it on it's edge,
it 
would probably break a few big chunks off.

I went to Autozone to price parts, and I decided to completely redo both 
sides- new drums, springs, pads, and shoes. Now the weird part. Spring kit

and pads are standard, in stock $6 and $22, so $28 so far. However, they 
show two drums- one is "plain" and is $61 each and has to be ordered. The 
other is "finned" and is $15 in stock. The picture on his computer is the 
same exact drum for each, so I don't know how to tell the difference.
There 
are two different brake cylinders. One is for a 7/8" brake line and one is

for a 15/16" brake line and he said it won't be stamped anywhere, I have
to 
bring it in. One is $11 in stock and the other is $45 and has to be
ordered. 
The problem here is I drive this car and I'd rather have all the parts
when 
I start rather than disassemble one day and reassemble a few days later.

Anyone know how I can tell which drum and wheel cylinder I have? One 
solution would be to order all the parts, use which ones I need and then 
return the rest.

I also bought a cheap brake tool kit at Harbor Freight for $8. I figure
I'll 
only be doing this rarely so why by Craftsman. The tools have no 
instructions, so I guess I'll be looking for help on the internet.