Possible Camaro / LeSabre Intake Retro?

With all the problems associated with the plastic upper intake plenum installed on most variants of the 3800 motor, has anyone looked into using the aluminum plenum that was cast for the 3800 engine in the V6 versions of the camaro? I need to get hold of some factory documentation to take a look at what might be different between the two engine variants, but perhaps a GM expert out there can fill me in. It seems however that this would be a really elegant solution to a problem that plagues my 2000 LeSabre, as an engineer I am interested in finding a more suitable fix rather than a modified aftermarket plastic unit. Plastic intakes on an engine like this are just dumb, I understand that re-routing EGR tubes and some other modifications on aftermarket kits have improved the situation, but I really want a fix. I need to get my hands on an old burned up plenum somewhere to see what would have to go into simply sand casting the same unit in aluminum, it shouldn't be difficult, but before I explore this fairly complex option I am curious about the adaptation of the aluminum plenum for the camaro? Perhaps I could find a nice easy way to retro fit the part. One obvious problem is that the air on the camaro plenum would be entering the engine on the wrong side, a crossover air intake tube from the stock air filter box would have to be fabricated to enter the engine on the left side assuming the plenum is not symmetrical. The thing about it is, from an engineering standpoint, I can only assume that GM engineers would only make changes to the basic 3800 setup to a certain level. For example it may be that the lower intake on the camaro motor is also different, but I can't imagine that the block or heads are also different. My goal is to really sit down and map out exactly what will have to be swapped out, I am just basically throwing the idea out there for everyone to consider, any feedback is appreciated.

It is MUCH easier to mod a Series III metal intake manifold to work rather than non-transverse.

Have you successfully modded a series III to work with the series II? I'll have to look into that, its a good idea if it would be possible.

It is easy.....sorta


L26 manifold is aluminum!!!
L36 manifold is heat treated 'plastic'.

L26 Inlet into the upper manifold = 75mm (circle)
L36 Inlet into the upper manifold = 95mm (across oval) X 68mm top to bottom

L26 inlet shrinks to 65mm (across oval) X 72mm top to bottom
L36 inlet stays static to the main pluenum area.

Runner fins inside the pluenum are thicker square on the L26.
Runner fins inside the pluenum are thin on the L36.
Runners attach the same and are the same.


photos:
http://users.adelphia.net/~raguirre/l26plenum/IMG_0009a.jpg

http://users.adelphia.net/~raguirre/l26plenum/IMG_0012a.jpg

http://users.adelphia.net/~raguirre/l26plenum/IMG_0015a.jpg

http://users.adelphia.net/~raguirre/l26plenum/IMG_0018a.jpg

http://users.adelphia.net/~raguirre/l26plenum/IMG_0024a.jpg



GM PART # 89017283
GM LIST: $181.22
GMPD PRICE: $103.29

then the TB adapter.....

http://www.zzperformance.com/products1.php?id=255

LIST: $109.99

than maybe a LS1 TB to go with it would be worthwhile. all this pulled off a grand prix site.