Hi Joe!
I asked Mr. Langdon which he recommend for a offy triple setup.
as mentioned above (for street application)he recomends the prog. Holly/Weber 2bbl. you just need adaptor plates for the carb and the special Holly/Weber linkage. as it works on the offy 2x1 intake I suppose it should also work on the tattersfield.
...but I think I read that you wanna race against your friend, so you probably should stay with the 1bbl carbs - somewere I read Zenith are the best...
regards,
Markus