Anyway to ID the date on a 351w ?

[Alvin in AZ]

If I remember right I took a pipe tap, tapped the
larger hole and put a small pipe plug in there.
I think it takes air down to the cat.
clint

I haven't cleaned one of them nasty-ass holes out yet so I don't know what they look like on the inside. :/
But tapping it for a pipe plug sounds like the best way to go to me too. :)
Also thought about using a hunk of 5/8" all-thread and cutting it off and hand-grindering it flat. LOL :)
I'd prob'ly hand grinder the pipe plug flat, if I used those.

That "crossover pipe" is really more of a "Y pipe" in that the air is forced into the heads at idle.
...while the ECM is running in "closed loop" mode and not listening to the O2 sensors.
It's supposed to be jump-starting the catalytic converter by heating it up.
Or something like that? ;)

You tell me, I'm still trying to learn this newfangled stuff. :)

Alvin in AZ
'75 F150 360FE T18 (bought it new! :)
'91 F150 351w E4OD (inherited, 73k on it now, was 66k)

[craftsman]

Those holes are already threaded, the ones on my 83 5.0 were, you just have to dig them out. I used a bolt and kelpt going back and forth like using a tap.