You might be looking for a 4300 for that date of production. 289 engines with the 4100's were only available on Hi-Po applications for 67 Mustangs. That would be a very expensive request if that were the one you are seeking.
Yes, Richard, Could be that the carb I'm looking for is more expensive. But imho fits best (performance in line with 4V intake manifold and 289)
Nevertheless, using a 4300A,
441 CFM, 1.0, (1967-1969) might be an option.
Using a 4300A,
600 CFM, 1.25 (1968-1974) will possibly not fit, too big for a 289 engine. And definetly not from a built date point of view.
I will not change anything else than the intake, spacer and carb. Target: + 20 SAE HP.
Thx Ralf