Heater core seals

[67conv6cyl]

Does anybody have an opinion on what are the best heater core gaskets on the market today for a small block heater core?

[BULLITT65]

heater core gaskets? like the rubber seal that it sits against in the heater box?
Or are you talking abut the gasket that the heater box sits against the firewall?

[KevinW]

I only bought one a long time ago from Ricks, the seals were not large enough.  It like they used a dried up seal to copy and it is too small.  I used them as guides to make larger/thicker ones from sheet neoprene. To replace the defrost seal, you need to drill out the welds on the tapered end

[67conv6cyl]

I am looking for the whole kit.....against firewall and inside heater box

[KevinW]

There are no pre-packaged seals for the firewall.  On the inside, the insulation pad is the seal. In the the engine bay, you use a rope of dum-dum sealer in the pocket of the cover. 

[68Zproject]

I either have this somewhere in my pile or was going to get it.  Either way I don't know if it's any good yet.  I do know the seal for the tubes is incorrect and most kit descriptions say so.  Either Steve's or Heartbeat used to anyway.

http://shop.stevescamaroparts.com/67-69-Camaro-Heater-Box-Seal-Kit-For-Cars-Without-Air-Con-150290.htm

Then you have to get the correct seal separately.

http://www.heartbeatcitycamaro.com/store/product/27699/1967-1968-Camaro-%26-Firebird-Heater-Core-Molded-Seal-Without-AC-GM%23-9776917/

Heart beat has the same same seal kit as Steve for $2 more.  I just personally don't like to deal with Heartbeat if I don't have to.