Quote:
Originally Posted by Coley
No rockers...just as they show here.
I know they are nothing unique or high performance....certainly in comparison to the world of Vortec and newer aluminum designs.
That said, it seems that this type of general (Mexico) type head is what is coming on most of those popular jegs/summit crate engines (260hp/290hp) and most of these engine buyers seem to be fairly happy with overall results. I figure they can't be that bad for a quick bolt on or substitute on one of those 350's used for general everyday use.
Now...having said that.....I wonder if there is anything that could be 'easily' done to them to make them flow a little better? Maybe port match the intake gasket? any ideas?....nothing too extreme and mostly an endeavor rooted in curiousity and minor work. Something simple.
All Good
Coley
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If someone went to the expense of putting on aluminum heads, they probably replaced the stock rockers; they may have the rockers sitting in the corner and possibly even give them to you. Otherwise to use those heads you will need self-guiding rockers. Or, a set of rockers off a 96 and newer Vortec 350 will work. Scout the u-pull-it lots of 86-95 engines even have them even despite some of them having rocker guides still in the heads.
Even the head bolts off that engine are much better than the head bolts off older engines.
Before you sink money into the heads for valve grinding and milling, evaluate the "core shift" and see if you have good candidates. You are likely OK, but to be sure check them out.
Do as these guys did in this article and you will see improvements on flow for these heads, especially the valve angles so you will have to take them to the shop for that and the milling (recommended) and use steel shim gaskets on those heads for more compression and proper quench. You can play "pocket port" yourself with an in-expensive kit from Summit or Jeg's.
http://www.superchevy.com/how-to/463...gine-build-ii/