HP Z400: Opencore crashes, machine reboots, no errors/hints in log whatsoever

Hardware: HP Z400 workstation
CPU: Intel Xeon W3565 (Bloomfield, Nehalem, Socket 1366 LGA)
GPU: AMD RX470
RAM: 8GB DDR3 ECC
Motherboard: Proprietary, X58
Ethernet Card: Broadcom
What guide/tool followed: https://dortania.github.io/OpenCore-Install-Guide/
What part I got an issue with: Opencore itself, Legacy setup

Opencore Version: 0.7.2 Debug

Slowgeek Sanity Check: https://opencore.slowgeek.com/?file=nehalem0665tkp4a&rs=nehalem066

Complete Opencore Newb here, had some minor Hackintosh Experience in the past.

Anyway, tried to install Opencore with Mojave (followed the tutorial closely and fulfilled all prerequisites), and the machine crashes out before i see the Apple boot screen. I know some people got their Z400 running with Mojave and Opencore, so this should be possible.

The log actually looked pretty good, cleared all errors that i got before, but my machine just craps itself and reboots.

What files/config I am using:

These are the last few lines in my debug file:

40:866 00:115 OCAK: Replacing _xcpm_SMT_scope_msrs data 2 0

40:982 00:115 OCAK: Replacing _xcpm_SMT_scope_msrs data 2 0

41:097 00:115 OCAK: Replacing _xcpm_SMT_scope_msrs data 2 0

41:213 00:115 OCAK: Not matching _xcpm_SMT_scope_msrs data 2 0 862A090600007080

41:407 00:193 OCAK: 64-bit MiscPwrMgmtRel replace count - 7

41:522 00:115 OCAK: Patched writes to MSR_MISC_PWR_MGMT

41:664 00:141 OCAK: 64-bit PanicKextDump replace count - 1

41:780 00:115 OCAK: Patch success kext dump

42:057 00:276 OCAK: 64-bit LapicKernelPanic replace count - 1

42:172 00:115 OCAK: Patch success lapic

42:290 00:117 OCAK: 64-bit LapicKernelPanicMaster replace count - 1

42:406 00:115 OCAK: Patch success extended lapic

42:522 00:115 OCAK: Skipping power state patch on 180600

42:638 00:115 OCAK: Skipping SegmentJettison on 180600

42:827 00:189 OCAK: Reducing 64-bit prelink size from 3D63000 to 3A99000 via plist

42:971 00:143 OC: Prelinked injection Lilu.kext () - Success

43:102 00:130 OC: Prelinked injection VirtualSMC.kext () - Success

43:390 00:288 OC: Prelinked injection AppleALC.kext () - Success

43:521 00:131 OC: Prelinked injection USBInjectAll.kext () - Success

43:650 00:129 OC: Prelinked injection WhateverGreen.kext () - Success

43:766 00:115 OC: Prelink size 64225280 kext offset 61444096 reserved 2781184

43:918 00:151 OCAK: 64-bit AppleIoMapper replace count - 1

44:033 00:115 OCAK: Patch success com.apple.iokit.IOPCIFamily AppleIoMapper

44:159 00:125 OC: Prelinked status - Success

Extra Info:
i prepared a google drive folder with all relevant files if someone wants to investigate: https://drive.google.com/drive/folders/1DJYAWkD-OyLSMiu24JiC4mkIi9IbZuPV?usp=sharing

Appreciate any kind of help!