My experience since 1999 is that the V8Archie kit is well proven, trouble free, and bullet proof.
Engine and F40 mounts are all solid.
It's been a long road to restore this car to the current generation and I'd be glad to correspond via PM or email. It's not really suitable for this thread and there are other threads with my progress on this project
First, I've not yet driven the car and it's still up on blocks although it's been run extensively. You are astute with your question about vibration. So far, no noticeable vibration of the rod that contains the assembly. If necessary, I'll stick some sort of shim behind it. For anyone who decides to mount more than one gauge this way, if it were me, I'd use a larger diameter rod and mount them the same way. Worst case is to add a shim down where it's not noticeable.
The original V8 Archie swap by me was in 1999 and I drove it trouble free until 2007 when the OEM GM ZZ4 seized. It sat in my shop until 2015. I've worked on this for 5 years
I expect to put this car back on road in the next few weeks.
To answer your question, it's a custom build 355 cube SBC with AFR milled heads, Holley Multiport Sequential EFI, 427 Dyno HP, F40 Archie kit, etc. This motor has custom baffles in the sump to control oil wash during launch with a cross mounted motor. Oil lines and remote filter are Canton Racing. You can search on the Forum on the details or PM me.
------------------
88GT 355 CI Sequential Holley Multiport , AFR milled 180, Dyno'd at 427 HP, 320 WHP
anderson@gdsconsulting.com
[This message has been edited by V8Steve (edited 06-05-2020).]