Hi
it looks like it should fit, if you are running the trans inverted for the GT 40. You will also need the smaller 117 tooth flywheel with this bellhousing and either a double or triple plate clutch for 440hp plus.
Take a look at the ZFQ / ZF bellhousing thread, the centre bottom hole is redundant for monocoque's and it takes the standard Ford flywheel and clutch.
Proposed new ZFQ/ZF Ford/Chevy Bellhousing
regards
Chris.