Vendors like Langdon's Stovebolt and Clifford's both sell these so have some info on their sites but pricey. I used the 5200 Holley-Webers on my 46 with great results. These came on Ford Pintos in early 70, but Langdon's no longer stocks these. The base gasket should be cheap and available at Napa etc. Also search for these on Jeep sites and also used as replacements on lots of other cars. Several places stock adaptors for your one brl manifold. Also watch this link re. a '57 235 running what you are looking for. http://www.trifive.com/forums/showthread.php?t=148305 Best of luck

Last edited by JiMerit Boltr#43; 03/10/2016 8:49 PM.
It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed