I have a 230 in my 51 dodge and have been having problems with acceleration, I have checked the accelerator pump and it's working fine also checked fuel pump and replaced fuel filter no problems checked plug wires there fine and just adjusted the sisson choke according to the manual and it idles and runs great until the butterfly opens all the way up then it sputters and spits back thru the carburetor, Any help would be greatly appreciated I'm going in circles here..