1978 350 wows
 

Hello I have been out of the Chevy V8 world for about 15 years. Picked up a 78 3/4 ton.. It starts and idles. Fine. Will Rev up. Smooth, but as soon as I put it in drive, it starts bucking and popping out the carburator. Wanting to die, It currently has an eldabrock 4 bbl.
could some of you fine folks give me an idea where to look.? And refresh my memories.
many thanks