Living Dangerously - About to tear down a 1970's film camera

My father-in-law generously gave me his 1970 Mamiya/Sekor 1000 DTL SLR.   My only mandate is to get it to work.  In order to do so, I need to replace its light seals, and maybe clean the pentaprism and focus screen, two things I have never done.  But I'm in no position to blow $150 on a repair, so I'll have to do it myself.   This scares the hell out of me.  

But, I did tear down my 1962 Garrard record player, and successfully rehab it so that it's almost like new, so what's a camera...with it's thousand tiny screws and other parts?   So, here we go.   Living dangerously, and I better succeed, or Vinnie's gonna have my head.   Will update.