Hey guys I did mine last year and had the same freakin results. I ended up ordering three different cores, Orielly's, Rock Auto, Summit. I took the Orielly's core and took it to my radiator guy and had him reposition one tube. I also had him build up the solder around both tubes. I also changed my old blower motor and found out the hard way that you do have to remove the passenger's side fender. What a pain in the behind!! with lots and lots of cursing. Get someone to help you especially if you like your paint. Also when your putting back your heater vents. WARNING!!! MAKE DARN SURE THAT YOU GET THE DEFROSTER Y SHAPED TUBE IN FIRST BEFORE INSTALLING YOUR HEARTER CORE COVER BOX!!! I also got the dum dum tape/putty for the engine side heater box cover from Ground up http://www.ss396.com/mm5/merchant.mvc?Sc..._Code=JCS-10459 This stuff really works excellent you cant screw up. Also if your changing your firewall padding your going to want to install the padding before you install everything else. Oh yeah the heater core box seal kit most of the foam pieces do have a place to go. My seal kit never came with instructions and the company that i purchased it from only could tell me that its for numerous years. This is what I experienced and maybe for others it wasn't so bad. I got my but kicked. I truly thought it would be a walk in the park and never did research before tearing it all apart. Good Luck!!