Perimeter bolt valve cover conversion

[LT1Nova]

Somewhere in my internet surfing I ran across a head porter that had a weld-in bung that they used for doing perimeter bolt valve covers but I forgot to bookmark it. As anyone else run across this? It shouldn't really matter but it was for aluminum LT1 heads.

[Fast01]

If you're looking to put perimeter bolt valve covers on center bolt heads you can get an adapter right out of the GM Performance Parts catalog. I think Proform might make them as well. I actually had a set on my old L98 aluminum heads so I could run roller rockers without grinding.

[LT1Nova]

I have a set that I had a friend at work make but I'd rather not use them and two sets of gaskets if I don't have to. They may need a but of clearance to fit under the Pro Magnums.

[Fast01]

Here's what I'm talking about.

https://static1.pt-content.com/images/pt/2007/12/55550120-1.jpg (http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_320392_-1)JEGS 50120 (http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_320392_-1) Valve Cover Adapters 1987-Newer Head to 1959-86 Valve Cover Sold as Pair Item# 555-50120 (http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_320392_-1) Only $129.99

or
https://static1.pt-content.com/images/pt/2007/12/80924502540-1.jpg (http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_70620_-1)GM Performance 24502540 (http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_70620_-1) Valve Cover Adapter SB-Chevy Item# 809-24502540 (http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_70620_-1) Only $155.99

They both use an o-ring instead of a second gasket. I did have to grind them a little bit to clear the trunions though. Other than that they worked great for me. Hope this helps!