Intake Manifold Bolt size(s)

There are factors that MIGHT make the lengths differ from stock. If the flange in the new manifold are thicker or thinner.

I'll find a set of stock I have and get you a measurement.

The set of OEM "23" 67 dart intake manifold bolts measure:

washer to end 1.5"
diameter 0.365"
pitch is 16 TPI
9/16" hex head
Overall length 1.88"
All the same length
Total 12

I have some others (don't know the application) that are 1" washer to end

Best thing you can do is set the manifold in place and with a wire measure the depth