There is a difference, the fuel on later model EFI engines is introduced at the base of each specific runner.
We can argue differences in every example. I am just stating the fact that tunnel rams work great on the street and have for decades. Try one before you say they don't work.
I’m not saying they can’t be made to work, just that the example you used isn’t similar. The single 4bbl the OP wants to use isn’t going to help either in terms of looks or fuel distribution.
I would guess it came on the slow boat from China. Look at the outer runners, what are the odds you will get anywhere close to decent fuel distribution?
I ran a cast single four tunnel ram on a 350 hp Ford 302 in a '54 F100. I drove it for years with a 750DP without any driving issues during hot and cold weather. I also tried a borrowed Predator carb and liked it even better. I have also run a two four tunnel on a 400 sbc in a '46 F1 and a 350 sbc in a '53 Stude pick up both with a pair of 600 cfm Holleys. There are no special carb adjustments or tricks. Those old trucks can run a tunnel ram under the hood without cutting a hole in the hood!
Without injectors at the bottom of the flange? Not good.
Back in the day I ran a single carb tunnel ram on fairly stock ‘70 Z28. Ran great. It was a Summer only car so I didn’t have any cold weather issues. Love the look. Left my hood off for the summer.
