Aluminum Head For 4.0L

I've seen a 4 valve set up with only two pushrods- the rocker had a bridge on the tip, and that bridge worked two valves. I don't remember what that engine was. Obviously this would be some high end stuff, and they're probably not going in that direction, but if they were I think it would be cool. Also, I think that maybe once they have the base line tooling and design done, maybe it would be possible to come out with another, more modified head that reuses a lot of the stuff from the first. I don't really know the ins and outs of head design and manufacturing, but maybe that would be a way for them to put out a higher end head but still get the sales with the cheaper one.

danleym wrote: I've seen a 4 valve set up with only two pushrods- the rocker had a bridge on the tip, and that bridge worked two valves. I don't remember what that engine was.

Mack?

How about going all the way, DOHC?

OHC (single or dual) would be a LOT of work! The entire front of the engine would have to be redesigned -- THAT is "why not"!! Sure it can be done, that's basically what Pontiac did to the Chevy I6 to create their SOHC six in the early 60s. 

The whole point is that would have to be a direct replacement, just like the V8 head with improvements in flow and better combustion chambers. I've always liked the older shaft rockers too, but then you would have to find a old set or build all new stuff too. 

I don't know, I enjoy my AMC i-6 engines and frankly have gotten a lot of street performance out of them.  Given limitations of the some 53 year old design and honest 160 or so HP with out much work certainly is street compatible and there are few things that might make 200 hp look good on the street and still be cost effective.
But Hesco's head at almost $2000.00 for something that seems to be on permanent back order. The fact that to the best of my knowledge there is no active class racing series that uses this engine any more and the very fact that in general, it is not a high rpm engine and while it can be made to turn tight, most of them are too long in stroke to do it reliably for too long I don't see a market for an aluminum head.
That kind of money will build a healthy turbo engine if there was a need for one.
My druthers at the moment would be to continue working on my Short Stroke 232 to see what I can get it to do, but at Hesco's price of 2 grand? I would not bother with it.
Edelbrock prices for V8 is about the same or less. I would not even be interested in overhead cam if the thing could not twist tight enough to make getting rid of pushrods worth it. And that could be done using cog belt technology I would imagine. If some one was serious about it.
I do remember when Clifford offered one. I don't know if it was Hesco's or not, but at the time it was viable expense.