Infra red ISO?

Hi there I want to shoot some BW infra red films. Can anybody give some info about what's the Film-speed to be set in the camera?

Are there standard speeds and can yuo push pull the roll?

How does it differ in developing time from normal BW films

(I have been shooting TMax 100 and developing in D76 1:3 for 9.15 Min in Ice cold water) Thanks

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