The IM bolts require a deceptively little torque (in/lbs) and a good torque wrench. MSD provides very good instructs for installation. Good luck and don't use a dorque wrench on this one!

They also recommend you use blue loc-tite on the IM bolts.
https://documents.holley.com/frm3355...4_bxw_0718.pdf
BTW- did you replace the foam noise insulation under the OEM IM? I did not on mine and have had no issues with sealing, etc... and it was easier to line up and re-install.