"Newbie" Needs Help buying parts.

[dropanddrag71]

I just got my 70 truck less then 3 days ago, and i need some very simple help with buying parts.. I appologize to the long time, hard core group for such stupid questions, but here goes!!
I have a 70 C-20 and went to buy shocks at LMC and heres what i ran into..
My truck says the follwing int he Glove box..
Vin CE240Z
Model CE20934

Glove box says Custom
Outside emblum says Custom/20

Inner glove box decal says this..
F60 HD Front Spring
G70 R Susp rear spring
G50 HD rear spring
F52 Front shock
F59 front stab EQ
Z62 cust comf conv EQ

Now LMC says for the front shocks Except custom camper and HD. now even thow it doesnt say Camper anywhere, i should always assume when ordering i have a HD truck?

what does Z62 option contain...
Ialso am searching for a bed mat i see on many trucks, do they make them for my year? I cant find them in either summit or LMC
Thank You Paul