IR and Bellows

I have a Wista 4x5 field camera. I would like to do some Infrared work but I am not sure if the bellows is Infrared proof many bellows are not. At the price of 4x5 IR film I hate to purchase, test and find that I cannot use it. Does anyone have any expierence using IR and the Wista?

BH

I have a Wista 45DX and while I have not used IR sheet film I have used Konica IR with a rollfilm back with very good results and no fogging.

Mike