Suggest you go to the msefi.com and msextra sites and research the issues with siamese port heads. The mini engines have the same issue and are discussed in detail.
A viable alternative is to use 3 TBI's - TBI's off of 2.8 GM V6 engines would be the right size. Since TBI mimic a carb fuel delivery - just with much better fuel control - the A/F delivered at the port is more uniform - using a plenum would assist.
Last edited by efi-diy; 11/13/16 02:49 AM.
