Think we need a pic of the PES intake you are talking about when you get a chance.

I was thinking it was a modified clifford with welded up floors & there bolt in lumps?????

Or is it that long looking tunnel ram??? I think if it's the tunnel ram looking intake,,,,need to start off @ a higher RPM like 4000-4500 range. IMO Low RPM will give a weak signal to the carb.

Leelites will know ... J.K. LOL

MBHD

12 port SDS EFI