Hey Chevelle fans I am running a 402BB 9:5 to 1 comp comp cam 278 dur. 510 lift headers H pipe 2.5 in. With the stock Rochester Carb up jetted and Stock cast manifold. Looking to put on a carb spacer 4 hole or open??? Can not find spread bore 4 hole does any one know where i can get one? My trans is a TH400 2600 stall conv. Any thoughts would be great.
Gary.

pep boys used to carry them for 20.00 bucks.