[100IH]

I don't think anyone mentioned working the casting cold, That too works well without removing material or using heat. Thicker gaskets are the cause of warping IF they are more porus. And if the thicker gasket is hard,non-porus, it won't seal. When clamping the individual components hot or cold; clamp to a flat, rigid iron piece and not to the other half of the carb. because you only want one of the components to bend (straighten out). When clamping to the rigid plate, clamp on either side of warp and use shim under the high spot. When clamping both halves of the carb. body together there is no control over which half is going to move.