How to get 400 hp out of 1971 340 .30 over

Illahe said
Have you Spoken to Steve Taylor? Carb builder in Tx. Ran Bandemere successfully.

I talked to a carb builder in Texas a month or two ago. Actually his wife answered the phone but couldn’t answer many questions. I’m not sure if it was his shop or not. I’ll look it up again to find out.
Thanks