Tillotson Carburetors

Looking for blueprints on low side port holes on some older filly carbs ,342,348 ,or any info .Found one for 348C in some of EC old info.
Call ecbirt distributing and a tilly carb tech will talk to ya. I've found it to be best to send the carb to them and let them build it for your app
cost in minimal. It will be ready to rock n roll when ya get it back. just some optional advice