340 idle problems

stock 340 455 268 cam had 670 streat avenger on wont idle sent it back still nfg. had intake machiened to match ports. fuel presh 6psi.put 650 double pump on runs fine 10 inchs vacume at low idle had budies 750 with big jets runs fine.I paid real money for that avenger id like to use it. any tips would be appreciated.
Author: admin