X3 .....I'll be on day 3 with my heater core replacement, because once I got the case out, it turned into a restoration of the case. I had to take it all apart, clean it up, clean surface rust from the metal parts and paint them. Plus that rear vacuum actuator had a rusty nipple...the same one you had a bad hose on. My hose was also falling apart. Fortunately I have a parts car from which I pulled another heater box, and it has some better parts like another actuator. Tomorrow, I'll have to get some new foam too and new piece of vac hose. So, it's been a pain, but ought to be nice when I'm finished.