I trust him to do the work.
There are a bunch of reputable carb shops that can do E85 carbs now. Talk to them and pick who you want (including Drag Chevette - Mark).

With anyone, tune the carb after you get it for optimum performance.

Jim

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1