Anyone seen this?

[Traffic Tony]

I remember seeing a how-to for drilling and tapping the back collant passage to open it up. This was to improve cooling on a 351w.

Does anyone remember this? Where was it?

They had some good pictures and a parts list that was like under $30 from the local hardware store.

 

[Traffic Tony]

Yipee!!!

I found it! Thanks for looking and trying (if ya did...).

Here is the link if anyone else needs more cooling...

http://classicbroncos.com/manifold_cooling.shtml