Okay this is where im at, i put a new cam/carb/intake/pertronix on my 289. I was able to break the cam in fine, ran it at 2500rpm for about 20 mins. The car never idled below 2500 rpm. The carb was bought used on ebay, so I swaped it with a known working 650dp. Now I cant get the car started, it just cranks and cranks, ocastionaly ill get a little sputter out of it but thats it. The cam breakin went fine the only gotcha is i had a big backfire trought the muffler after i shut the car off after break in. What could be wrong, what can I check, i know i have spark (coil and plug) and have 7lbs fuel pressure.