Floor tar restoration, To do or not to do Options

[sixaddict]

Redoing a 74 conversion that could be street and/or track but for eventual sale.(i.e so its not really for me)
I am trying to decide if I want/need to replace floor tar. I have gotten both sides of this. One renowned restorer says it is a rust magnet......another says sound deadening is worthwhile. I am kind of falling in behind sound deadening although that is sales literature copy.
How about a bit of guidance on this. Feel these cars are noisy enough without removing the tar insulation. What say ya'll ??
THX
TOT

[charliew]

Street cars are much better with the best sound deadening you can afford. Tar is for the guys that think old is good. New technology is far ahead of tar. Maybe the dynamat type stuff and the foil backed insulation over it if you are sure it won't be getting water in it.

I did a 42 ford jeep, not mine another one for a friend and I tried to seal all the seams really well preparing it for the rains it would see and it's owner said it would never get wet inside so not to worry. The first parade it was in on Veterans Day it was the first vehicle and it rained for the whole parade.

Don't plan on keeping your car out of a sudden rain. If it leaks (I don't know how hard it is to waterproof a 914) try to make the inside waterproof. Try to make sure it dosen't leak. Or make it as good as possible and take it somewhere and have a commercial bedliner put in it. It will be adding more weight but it will be way better than tar sheets I'm sure. Maybe the bedliner and the insulating mat that is foil lined that could be removed and dried out. I have used several two part bedliners that you get at auto paint stores and gator guard seems to be ok but it takes more than you would think to get good coverage. I'm still not convinced it's as good as rhino liner or the other name brand liners that are put on commercially. I do know it will add a lot of weight.

I also have fieros and they also develop rear window leaks. The bodies just twist and torque and wiggle the rear windows loose so that is always a challenge to keep aware of. I learned on 4wd stuff that the stiffer the suspension the harder it is to keep front and mostly rear windows sealed.