351C Hemi Aluminum 32 Valve Heads

That shop has been fiddling with 4-valve heads on production V-8s for quite a while. The thing that I always wondered about is the fact that the system still uses pushrods to actualte the 4 valves, so I'm unsure of the rev-ability of the system. To my knowlege, there have never been published dyno runs for these heads. Incidently, straight-valve engine such as a Chevy or a 351-W is relatively easy to do, but a stagger-valve head such as the 351-C or a bog-block Chev where the valve stems run at an angle to each other, is much more difficult to engineer mechanically. I note that the owner of ARAO has constructed a Bonneville car for runs this weekend in Utah,but the engine uses swapped & refabricated twin-cam/four-valve heads from a different engine rather than the pushrod system you speak of.

Thanks Jack for the info and the site doesn't offer any details about rocker arms and ratio's as I wasn't sure if they are even supplied. In the package section it does say they are complete and ready to bolt on. It would be very difficult to open two valves with one push rod on a slight angle.

I believe they use forked rockers in pairs off one pushrod. The 35i-C with 4V heads has so much valve area that its extremely difficult to improve upon the original design IMHO. Aluminum SVO heads at $2000 assembled would give one more 'bang for a buck' and are a well proven reliable design, having been used in Winston Cup, dirt-track sprinters and Busch engines since the mid-80s up to today. Such enginess routinely put out 850 horses, and head/valve failure is extremely rare. Other stuff lets go at times, but the heads are golden.