In my 62 with the 305 comm. I had the WW stromburg rebuilt profesionally but she dose not want to fire off now, is there any common problems with this or should I look at the timing chain? before hand it would run but bacfire a lot if you stepped on the accelerator to fast, you really had to ease it up in RPM's then release the clutch and it would do ok, the carb was origonal never rebuilt so I figured it was the problem but guess not, any suggestions? Thanks for answers in advance everone.