Hey guys, just curious to see if you can shed some light on this..

My truck has a 235 six, I've spent the fall/winter getting it ready for the road, as it has sat for a long time. The engine had an annoying sputter when revved, and would "pop" from the carb (backfire?) So here's what I did...replaced the carb, replaced the fuel pump, fuel filter, checked points, reset timing, changed the plugs and wires, and put in fresh fuel. It runs better now but still sometimes pops out the carb and sometimes out the exhaust. What did I miss? It's driveable and will be on the road in a couple weeks, but I'd sure like to solve this one little glitch it has!

Thanks

Adam