They would look great Dave. Making a manifold wouldn't be to hard either. A fabricated aluminium one would be the go.
Who makes the throttle bodies and how much are they?
These guys are doing an 8TB setup for the LS1 for $3750
http://www.hockingracingshop.net/
It's a bit cheaper than the Harrop setup but I reckon the Harrop hurricane looks to be a better product for only $250 more.
Harrop Hurricane
Cheers