I have a Barry Grant Speed Demon Carburetor 650 cfm, mechanical secondary.
I had it on my 355 monte carlo a few years back. I only ran the engine for about 6-8 months. This carb has honestly seen no more than 5000-7000 miles at the most. Basically brand new.
Also has a stainless braided double feed fuel rail with anodized fittings and a fuel pressure gauge.
Barry Grant Speed Demon Carburetor 650 cfm