Welding intake manifold (Holley Street Dominator)?

[ChargerST]

What precautions do I have to take if I want to weld on an aluminum intake manifold?
I'd like to fill the spread bore pattern on a Holley Street Dominator (make it a square bore).
Is it sufficient to bolt on a steel plate to the carb pad (basically a thick gasket shaped plate) to avoid warping the manifold? Or will it still warp?
Otherwise I would need to fabricate a jig that ties together the carb pad and the head mounting flanges..

 

[496 polara]

Edelbrock 2732 Edelbrock Carburetor Adapters | Summit Racing


Sounds like a lot of work when this will work fine. Yes I have used them on multiple applications.

 

[451Mopar]

Fixturing is a good idea, but I think your still going to have to have the welded up carb base machined flat.
I would grind prep the surface to weld, then clean with acetone, pre-heat to draw out impurities and then re-clean before welding.
Found this, pretty good example:

 

[stage3]

when i modified my crossram max wedge intake i bolted it to the milling machine fixture so as much less chance of heat distortion that the TIG welder would generate. and it got Darned hot...