If I remember right the vent opening for the duralast may be in the center of the back of the top, but a bigger hole that requires an extension hose and adapter to hook it up. But I have seen them properly vented in the past through the shop.

__________________
"When you do things right, people won't be sure you've done anything at all" (Bender, futurama)

You make something idiotproof, they'll make a better idiot

You think professional is expensive, just wait until you pay for amateur.

Never let your sense of morals prevent you from doing what is right.

Examine what is said, not who speaks.

X5 pics

RIP 4.6is.....

2003 4.6is