Air mixer works. Blower works on all settings but when I switch to defrost it keeps blowing out the dash and won't go up to the windshield. I think it's a vacuum problem. There are 2 vacuum lines hat go through firewall that are heater related. One is grey and connects to my coolan lines and the...

Looking for a speedometer cable that fits 1981 w250 with 360. See stuff on eBay but it's too long or has wrong fittings.

Air mixer works. Blower works on all settings but when I switch to defrost it keeps blowing out the dash and won't go up to the windshield. I think it's a vacuum problem. There are 2 vacuum lines hat go through firewall that are heater related. One is grey and connects to my coolan lines and the...