For 70-72 455 with ac, is the heater valve diaphragm facing, towards firewall, or radiator? Pics if you have any.
Thanks

 

The heater hose barb points outboard and to the front per the PIM.

 

Thanks Joe,
Im replacing my original valve, and the only available valve is configured a little different, so the reason for my question.. Is the L shaped valve available, I’ve looked everywhere.

 

On an A-body that needs to be a normally closed valve that opens with vacuum applied. Many of the aftermarket listings get this wrong.

 

The factory part number for the 1971-72 A-body valve is 407738. Note that 407738 was superseded by 411822, which also only fits 1971-72 A-body and actually looks like the new one you have with the hose barb pointed up. The PIM diagram I posted was for 1970 that still used the L-shaped valve. And pay no attention to on-line vendors who may claim that 407738 fits 1971-74, it only fits 71-72 per the parts book. The 73-74 cars (and all 1971-up full size) use valve 411823, which is the normally-open version. Be careful that 411823 also looks like the one you have, so be sure to test it by blowing through it before you install it. If you can blow through it, it's the normally-open 411823, not the normally-closed 411822.

407738:




411822: