Well then, if your eng. is mech. alright and the ing. is all set and double checked it has to be the pump or the carb. Quadrajets (I myself like them most don't) can be tricky. Make sure all the passages are clear is one of the main things,air or even tag wire.I have had a few apart more than once before they were right and i have done lots &lots.(new carb kit&float)Were you keeping it running with fuel directly thru the throat or filling the float bowl thru bowl vent tude on top??

Hey bluez, forgot to ask whats a 305 anyway?????

Small block chevy.

If it has points you also have a ballast resistor. Usually mounted to the front of the coil. This resistor drops voltage to the points at idle so the points don't get burned. They are cheap, you might consider changing that and I would look closely at the points again. Burnt points act like you describe.

If you find out the problem is in the points I would get rid of them. I have an 80 Sea Ray DA with a 350 in it and ditched the points for a electronic ignition kit from petronix. You can find them for 65.00 online, they fit under the distributor cap and make your engine run a lot better overall.

I agree that your problem sounds fuel related. Id say fuel pump or carb issue. If you can get her to stay running by giving it gas I would start there and work backward. Check to make sure your getting good strong spark to rule out the points.

Billy

thanks for all the help. sat im going to dig into it again. i will let you know what the out come is.

I would check for a vacuum leak. Make sure the carb is sealed well to the manifold, check that there are no caps missing on the carb fittings used for vacuum to other things that may not be used on a boat like power brakes. Not so sure about a qudrajet, but Hollys have a 1/4" or so tube on back of the base plate for vacuum accessories. Make sure it's pluged.