I have no idea how hot my '68 roadster will get inside in the summer ask I bought it about 2 months ago, but I was wondering, has anyone any suggestions or experience with installing heat and sound insulation? 

That sounds very cheap for the whole kit.  I'd be very wary of the quality.

You really can't go wrong with Dynamat, or something similar.  I cut and installed mine in an evening.  Just coat the floorboards with a good rubber cement, lay the mat down, and trim.  Cover the seams with HVAC foil tape. 

If I could ever find the time to finish the damned car, I'd tell you how well it works...

Dyoes, we have a lot in common!  I did the Dynamat thing too but the car is still up on jacks. 

Instructions for posting pictures

Haven't been here for a long time.  I went to Lowes and bought a foil-backed adhesive foam.  Inexpensive and worked well.  Don't remember the brand, sorry.

Lizard Skin for sound applied first then Lizard Skin for insulation second. If you want to get crazy do inside and out and use Dynamat .

I've had a running joke that the car was a 9-month project that is now in year three.  But after looking at the calendar again, I've realized it's year four... 

Got the car off of jackstands a few months ago, and was determined that it wasn't going back up.  Except for that transmission leak... And now that "wump wump" from the drivetrain when it's pushed.  Arrgh!

Anyway, here's a shot of the interior right after I laid the insulation.  Failed to mention that you can also buy carpet with some insulation built in.

We are about to replace carpet in Dad's '69 427 roadster and are going to insulate that one as well.  That car is HOT to drive... even with side pipes.  I'll post some pics when we get to it.

Foil backed insulation from a roll, all seams sealed with reinforced aluminuminum foil tape. 3M spray adhesive to hold it all down nice and snug.

Where did you get that stuff Joel?

It may be called "Reflectix", and I found it at my local hardware store.