QUOTE(Detroit @ Feb 24 2018, 08:46 PM)
What's everyone's take on this stuff? I'm putting a new carpet set in, so now is the time if I'm going to tackle it. Is this a must do type of job?...
It looks pretty good on the outside, but, of course, I've no idea what it looks like underneath.
Click to view attachmentIf the topside of the floor were all looking clean & rust free, with no other evidence of inside water intrusion & rust, then I'd say that you could leave the tar in place.
However, in your pic I see rust under the driver's seat near the tunnel & a couple of other places - so you'd probably be safer to strip the tar, deal with any rust, prime with Wurth or Eastwood Zinc Rich Primer (serveas as localized hot dip zinc does on newer Porsches - zinc becomes sacrificial metal to water/rust before the steel/repair-patches/etc.), then do an epoxy prime & repaint to body color; & then replace with either an AA floor tar kit (or cut your own from sheet - tar gets painted over, as you can see, but zinc & epoxy primer is under), or Dynamat, etc.
Heat gun & scraping seems to be the most successful wa to remove, & is in the factory repair manuals as such too IIRC.
PS - IMHO - strip the entire floor & sides/longs, F & R firewalls inside then too - anywhere that you can see possible rust & can reach, & treat,prime, paint as one job.
Good Luck!
Tom
///////