Manual tranny bellhousing bolt length?

[Rob72]

I've pulled my auto tranny, and have my 5spd ready to install. I noticed (and think I've heard this before), that the four bolts that hold the bellhousing to the block are shorter for the auto, and won't make it all the way to the block when the manual tranny is installed.

The flange on the manual tranny is 1.5 inches, the auto is 5/8. So does anyone know if I can just estimate the length, or do you know the exact dimension?

Thanks!

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Rob72

5-spd/4.11/SU's

[Rob72]

For everyone's info:

The length for a manual tranny is 60mm in length & 10 x 1.50